Characters / Jurassic Park – Tyrannosaurus

aka: Jurassic Park Rexy

Main Character IndexJurassic Park (Novel) | The Lost World (1995)InGen | Masrani Global and Jurassic World Staff | Park Guests (The Campers)Other Organizations | Other | Prehistoric Animals (Hybrids, Non-Dinosaurs, Ornithischians, Theropods [Tyrannosaurus, Velociraptor])

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Tyrannosaurus in general

• The Ace: Tyrannosaurus is often depicted in the series as easily the most capable and majestic dinosaur, or at least second only to the Velociraptor. With a massive size, intimidating expressions, incredible strength, adequate speed, and is well-equipped to deal with nearly everything that can get in its way, Tyrannosaurus is an ace compared to nearly every other dinosaur it could compete against. While the Velociraptor has the Tyrant Lizard King beaten in intelligence and ferocity, the T. rex still has an advantage in a direct fight.
• Adaptational Dumbass: In an interesting twist, from the first novel Tyrannosaurus was described as an unthinking, instinct-driven super predator who was ultimately less scary up close than the highly intelligent, reasoning Velociraptor. However science moves on and it's now being argued that dromaeosaurs were fairly unremarkable in terms of their intelligence while some researchers are arguing Tyrannosaurus may have had comparable smarts to higher order primates like baboons. As the franchise has continued this has been dialed back somewhat as the focus on Rexy as a character has resulted in her developing a distinct personality while coming across as more intelligent as a result.
• Adaptational Wimp: Very downplayed; Tyrannosaurus in the series is treated as an apex predator and a force of nature that is nearly unparalleled by any animal. That said, it has one weakness, that being its eyesight is limited to only being able to see objects that move and thus cannot perceive anything that is motionless. In reality, Tyrannosaurus is determined to have excellent eyesight according to paleontologists, arguably among the very best in the animal kingdom, more accurately. Even so, this slight disability doesn't stop T. rexes from being dreaded by anybody who dares to encounter them.
• Artistic License – Paleontology:
  • While the skeleton is mostly accurate, they are shrink-wrapped with a conservative amount of fat and muscle tissue, with many of the fenestrae in the skull and features of the skeleton clearly visible.^note While the topic of feathers is debated, given the position within coelurosauria and many of its basal relatives possess feathers, they probably should have some type of sparse feathering on their backs, if nothing else.. Real T. rex would have been bulky and sported lips covering their teeth. T.rex also had forward-facing eyes in real life, and while these rexes don't have eyes completely on the sides of their head like most large theropods, they're still a little too off to the side compared to the real animal. They're also shown with an arching brow ridge over each eye, which isn't totally inaccurate but somewhat oversimplified compared to the rather complex series of bony bosses that adorned the cranial region of a real Tyrannosaurus skull. The famously powerful bite forces of Tyrannosaurus appear to be downplayed, as anything that gets in the jaws of a T. rex would either shrug them off (if they are large) and need a few more bites to be killed (if they are small). Granted, it is possible the T. rex were just not biting down hard enough (as Rexy was able to kill a Tarbosaurus with a single bite to the neck).
  • The first film depicts Tyrannosaurus as being able to reach speeds of at least thirty-two miles an hour. While some earlier speed estimates had higher-end top speeds, depicting such a massive animal being fast enough to keep pace with a speeding car was absurdly optimistic, even back then. Most modern estimates put an adult T. rex's top speed at only around 15 to 11 miles per hour (although juveniles would've been much faster). So while T. rex could probably outrun the average human on foot, an Olympic athlete is still faster, so it definitely couldn't catch up to a vehicle.
  • The series has infamously depicted Tyrannosaurus as being a Living Motion Detector, only seeing its prey if it's moving (although it was quietly dropped by Jurassic World). This is of course absolute malarkey and isn't based on any fact that ever existed. Studies of T. rex vision have instead shown the animal likely had superb vision, even greater than the acuity of modern birds-of-prey (and even if somehow they couldn't see their prey, they could obviously still smell them, because tyrannosaurs also had exceptional olfactory capabilities).
  • Another minor error regarding the eyes are their size; the eyeballs as depicted in the films are way too big. Real Tyrannosaurus would've had eyeballs about three inches wide at most, and only about half of that would've been visible. Although obviously still much larger than a human's eyes, on an animal larger than an elephant holding its head some fifteen feet off the ground, it would've appeared positively beady-eyed.
  • The series depicts Tyrannosaurus as having thunderous steps as a way to herald its arrival menacingly (unless it's plot-convenient for them to suddenly be stealthy). Fridge Logic ensues here: why would a predator have footsteps loud enough to be heard and felt as it approaches? Indeed, studies have indicated that it's likely Tyrannosaurus and other large predatory theropods had fatty tissue on the undersides of their feet to dampen their footfalls. There are thankfully some scenes where the rexes are capable of muffling their footsteps, indicating that they can control how loud their steps are.
  • The Tyrannosaurus is depicted with a Mighty Roar and basically codified the idea of T. rex having a thunderous scream, but there was never any real evidence for it, besides being cool. Most modern studies on dinosaur vocalizations suggest tyrannosaurs could not roar, but may have bellowed or hissed like a crocodilian.
• Bad Vibrations: A Tyrannosaurus is often heralded by the thunderous footsteps they make, a low boom with still water rippling in a rhythmic beat. Despite being a very bone-chilling sound to hear, it's far better than their alternative introduction, a sudden ambush out of nowhere and a quick trip down its bone-crushing jaws.
• Determinator: A Tyrannosaurus is a very determined animal and often doesn't give up on what actions it wants to take part in. In fact, the only times it stopped was when it chased away a rescue Jeep or when an InGen worker was able to escape via a helicopter, though around that point, Rexy was more interested in driving them out of her territory rather than wanting to eat them. For extra points, their own offspring can be a sensitive spot for them, and they will go to the ends of the Earth if it means finding their young and punishing whoever threatened or kidnapped them.
• The Dreaded: Discounting the raptors, T. rex is unquestionably among the most dangerous and frightening dinosaurs in the series, with the cast and most other dinosaurs expressing panic and dread at the very thought of having to encounter or think about the Tyrant Lizard King. Its reputation is well-earned, considering Tyrannosaurus can turn out to be quite persistent and resilient in its pursuit of either prey or whatever provoked the dinosaur first.
• Good Parents: T. rexes are often shown to be attentive and caring parents for their young, which is best shown with the tyrannosaur family in The Lost World: Jurassic Park and Big Eatie and Little Eatie in Jurassic World: Camp Cretaceous.
• Handicapped Badass: The fact that the in-universe species vision is based on movement does not stop them from being fearsome and competent apex predators.
• It Can Think: To a lesser extent than the raptors, but the T. rexes are shown to have intellect beyond basic instinct.
  • Rexy "tests" whether or not the electric fence is on with her claws before breaking through it. It's implied she does this every time she feeds near the fence, as it's very unlikely this was spontaneous.
  • Rexy, more than once, has shown that she knows how to throw objects to cause damage. This is very rare in the animal kingdom. The only animals that can do this (with something other than a body part or fluid) are all highly intelligent, like elephants, orcas, a few birds, and of course, primates.
  • The Tyrannosaurs are able to muffle their footsteps when they want to be stealthy, as multiple scenes of them sneaking out from nowhere show.
  • Buck and Doe are smart enough to sneak into In-Gen's camp at night without anyone but Ian and Sarah noticing. Buck does this again at the end when he sneaks up on Ludlow. Buck also doesn't attack Sarah and Kelly in their tent because it smelled its baby's blood close to them, and was trying to figure out if its baby was in the tent.
  • Buck also stays completely quiet while stuck in the cargo hold of the ship transporting him, only smashing out the moment the doors started to open. He knew that no one was aware he was stuck down there, and so patiently waited for someone to open the doors. This also implies Buck had figured out how the cargo door worked when he watched it trap him.
  • In Jurassic World, Rexy shows that she's a true Genius Bruiser when she thrashes the Indominus by smashing it into buildings, learns the larger theropod's attack pattern, and throwing it close to the Mosasaurus pool (even taking a few deliberate steps back) to finish it off. Not only that but she's also able to recognize that Blue is more of an ally instead of an enemy in this fight and once it's over, strides off without attacking the raptor.
• Lightning Bruiser: Tyrannosaurus is a massive carnivorous dinosaur with what is arguably the most powerful bite of any land animal that has ever existed. For its size, it's also quite fast and reactive.
• Living Motion Detector: In both film and novel, Tyrannosaurus is often depicted as having a form of impairment with its eyesight, namely that it can not perceive motionless objects and sightings. However, with modern science and paleontology having determined that the animal has one of the best eyesights of any animal, this comes across as a form of Adaptational Wimp, but this doesn't stop Tyrannosaurus from being a feared dinosaur.
• Mighty Roar: It boasts one of the most iconic in film history, and has even managed to find its way into all sorts of Dinosaur Media. A T. rex's roar in the series is made out of a baby elephant's call mixed with that of a tiger and an alligator, with the breath being taken from a whale's blow. For the record, it's probably unlikely the real-life Tyrannosaurus had a roar as depicted in the films.
• Noisy Nature: Tyrannosaurus makes a lot of roars and stomping sounds throughout the series. Heck, they can even be heard at a faraway distance, and they don't even need to be shown even once.
• Non-Malicious Monster: Unlike the Velociraptors that are mostly portrayed as uber-territorial and savage murder machines in the novels and the first two films, the T. rex is mainly shown to mind its own business and doesn't really care about anything else. It only targets its quarry if it's hungry or provoked.
• Strong as They Need to Be: The speed of the Tyrannosaurus usually varies depending on what is convenient for the plot, sometimes they can chase a car and in other cases non-athletic humans can run away from them.
• Terrifying Tyrannosaur: Zig-Zagged with Tyrannosaurus in the series. Its novel counterpart, as well as film versions on some occasions, portray the dinosaur as a ferocious, territorial animal that asserts itself as a dominant predator that few, namely the Spinosaurus and the Indominus, can hope to threaten. On the other hand, Tyrannosaurus in the films is shown in a more regal and triumphant fashion whilst retaining its nature as a predatory beast, with Rexy being seen as a loose Anti-Heroine at best.

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Novel Canon

Tyrannosaurus rex (Novel)

Tyrannosaurus rex ("Rexy")

A dinosaur that lived in North America during the Late Cretaceous period around 68-65 million years ago.

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• Ambiguous Situation: Via retcon from the sequel The Lost World (1995). In the original novel, Rexy's inability to see motionless objects is theorized by Grant to be a natural trait of the species based on paleontological findings at the time. But in the sequel novel, it's mentioned that Grant proposed an alternative theory that torrential downpour can confuse a T. rex because it's not used to a wet climate, which just so happens to be the weather condition during the breakout. Both theories are derided by Dr. Levine, who indirectly suggests that Rexy wasn't hungry when it encountered Grant. Suffice it to say, no one knows why Grant wasn't killed that night, although Rexy is shown eating a goat in its first appearance.
• Ax-Crazy: Both of the cloned tyrannosaurs are excessively brutal in the amount of damage and kills they commit. For specifics, the adult has a sadistic tendency of stalking and hunting Alan and the kids whereas the juvenile seems to take her time toying around with Ed Regis before mauling him to death.
• Creepy Child: While being a predator is to be expected, the way the juvenile tyrannosaur reacts to Ed Regis is very unnerving because she initially doesn't act predatory towards him. It actually plays around with him for a while, which makes it all the more frightening when it does attack and kill Regis.
• Disk-One Final Boss: The novel makes it seem that Rexy is the main dinosaur antagonist of the story, as her rampage cause devastation across the park and she's hunting down Grant and the kids. But then she succumbs to the tranquilizers shot by Muldoon before she has a chance to reach the Visitor Center; shortly after her sedation, the park's power shuts down and it's revealed that all of the electric fences have been off for hours. It's then the readers realize that the Velociraptors, regarded as even more dangerous than the T. rex, are the true dinosaur antagonists of the novel.
• The Dreaded: Well, this is a T. rex we're talking about after all. Rexy's presence scares the living daylights out of everybody, human or dinosaur, and the only option upon encountering one is Run or Die. Unless you have a hefty amount of tranquilizers of course.
• Evil Smells Bad: Rexy's smell and habits are presented in nauseating detail. She is described as smelling like a garbage dump and her tongue stinks of urine. While asleep, she's covered in buzzing flies and lets out a disgusting belch after eating a dead hadrosaur.
• The Heavy: Aside from the raptors, Rexy causes the most trouble for the park. She breaks into several enclosures to eat the dinosaurs living there, forcing the park staff to focus all of their attention on her (and ignoring other issues like auxiliary power), and she hunts Grant and the kids as they try to make their way back to the Visitor Center.
• In-Series Nickname: Robert Muldoon is the one who calls the adult T. rex "Rexy."
• Lightning Bruiser: Rexy is powerful enough to bring down a fully grown Apatosaurus and she can run incredibly fast, almost catching up to a gas-powered Jeep.
• Living Motion Detector: Rexy's vision is based on movement. A fortunate trait for the scared-stiff Grant when he finds himself completely exposed before the beast. However, the T. rex family on Isla Sorna can see motionless figures just fine, as poor George Baselton finds out.
  • Worth noting that the one instance in the first book is made a little more plausible by the circumstances: at night, under pouring rain interfering with Rexy's senses of smell and vision, with Grant standing right by a car that she could have trouble distinguishing him from. And at a time where she had recently gotten out of her enclosure and was probably more confused by her new environment than hungry.
• Not-So-Harmless Villain: The juvenile rex; while it appears less of a threat than the adult and not quite steady on its feet yet, it actually succeeds at killing a human, unlike the adult.
• Overly-Long Tongue: She has one that she attempts to snatch Tim with when he is hiding out of reach.
• Red Is Violent: Her species' primary color here is brick red. And she follows Grant and the kids to no end.
• Reptiles Are Abhorrent: Her reptilian qualities are really played up.
• Roar Before Beating: Rexy often roars at her potential prey before going for the kill, likely to make up for her motion-based vision impairment.
• Sadist: The adult and juvenile in Isla Nublar show shades of this, though it's not to the same levels the Velociraptors exhibit. Both like to take their time in killing human prey, but their methods differ; the adult constantly hounds Alan and the kids and keeps itself sheltered until the trio either feels they're safe or have outrun the predator, after which Rexy shows up unexpectedly. The juvenile decides to toy around with Ed Regis partly out of amusement and curiosity. For a while, it seems the juvenile tyrannosaur would be somewhat docile towards Regis before lunging for the kill.
• Scary Teeth: To be expected from a dinosaur with teeth like steak knives.
• She Is the King: Even more so than the films. While Rexy's gender in the films is emphasized as female, the novel often refers to Rexy as a male, which is lampshaded by John Arnold during the tour of the control room.
• Super-Persistent Predator: Unlike in the film, Rexy is clearly hunting down Grant's group for the majority of the novel, particularly when they try to reach civilization through the river system. She immediately disregards her freshly killed hadrosaur and goes after Grant and the kids in the lagoon, despite the hadrosaur carcass providing her with enough meat to keep her occupied for hours. She even waits for them at the base of the waterfall with jaws wide open, hoping for the humans to fall into her mouth. Ironically, unlike the film version, this rex fails to actually eat any humans (although she does lethally injure Ian Malcolm; however, he got better); it's the juvenile rex who devours Ed Regis.
• Terrifying Tyrannosaur: Rexy is the crowned attraction of the park and the most dangerous dinosaur on public display, so much so that the park staff prioritizes subduing the animal alive and unharmed rather than checking to see if they're running on main power or if the raptors are still in their holding pen. She spends most of the novel as a constant, terrifying threat to Grant and the kids as they make their way to the Visitor Center through the park, stalking them from a distance before attempting an ambush time and time again.
• Tongue Trauma: The adult is hit with tranquilizers that only start to take effect an hour later, as she's using her long tongue to pull Tim into her mouth. It collapses and falls asleep right then and there, and the massive teeth clamp right down on her tongue, with the text emphasizing the thick, red blood now bubbling out.
• Uncertain Doom: Well, more like most definitely doomed but the circumstances are unknown. Did Rexy die from the napalm bombing at the end of the story, or did she already drown in the pool she's in after being tranquilized by Muldoon?
• Unwitting Instigator of Doom: Her rampage across the park distracts the entire Jurassic Park staff from noticing that they've been running on auxiliary power the whole time, thus causing a power failure that allows the raptors to break free. Additionally, her hunting of Grant and the kids has forced them to take the river route, which has no motion sensors to signal back to the control room.

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Film Canon

Rexy/Roberta

Rexy (Tyrannosaurus rex)

She's big, she's mean, she likes eating lawyers, dinosaurs, and hybrids — ladies and gentlemen, we still have a T. rex!

Appearances: Jurassic Park | Jurassic World | The Evolution Of Claire | Jurassic World: Fallen Kingdom | Jurassic World: Camp Cretaceous | Jurassic World Dominion

Aggression Index: High

Park Attraction: T. Rex Kingdom

Diet: Carnivore

"Tyrannosaurus could bite with a force of over 12,800 pounds!"

— Jurassic World website [~57 kN in metric]

An old Tyrannosaurus rex and the face of Jurassic World; she was one of the dinosaurs who escaped during the initial disaster at Jurassic Park and is now relocated to Jurassic World as something of a mascot. Queen of Jurassic Park and World—a title definitely earned and not just given. Following the fall of Jurassic World, she retook her place at the top of the food chain before the destruction of the island resulted in her being released into the wilds in the western United States.

This page revolves exclusively around the film iteration of Rexy. To read about the novel incarnation, see the character page of Tyrannosaurus.

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• Accidental Hero: Rexy is a superpredator only interested in feeding or defending herself and her territory, but she has a long history of unintentionally pulling people's butts out of the fire.
  • In Jurassic Park, her timely attack on the two surviving raptors saves Alan, Ellie, Lex, and Tim.
  • Decades later in Jurassic World, she had no idea that the big predator intruding on her territory was a sadistic monster, but the Indominus would have killed the heroes without her unwitting aid.
  • A few weeks later in Camp Cretaceous, she would chase off trophy hunters Mitch and Tiffany from Main Street, where they were holding Darius and Sammy hostage, and would later eat one of the hunters when they became caught in one of their own traps while attempting to poach the dinosaurs.
  • In Fallen Kingdom, she has several, since her predatory instincts not only save Owen from a pissed-off Carnotaurus, but afterward she knocks the Gyrosphere Claire and Franklin are hiding in, sending it rolling down the hill ahead of the eruption to safety. At the end of the film, she eats Mills, who is an unambiguous villain and murderer. She even gets in an unknowing dig at the Indominus, smashing the only recovered piece of its skeleton and therefore limiting what research Wu can carry out in the future.
• Action Girl: She's a female rex, and with every appearance she makes, she proves herself to be a worthy adversary in combat against other territorial carnivores. The Big One, a Carnotaurus, the Indominus rex, and a Giganotosaurus all fall to her, even if the latter two make her work for it.
• Adaptational Heroism: In the novel, she could come off almost as sadistic as the Spinosaurus or the Indominus, though still more realistic. By contrast, in the films, she clearly operates on territorial and predatory instincts, culminating in her Villainous Rescue moment at the end of the first film. In Jurassic World, she's upgraded to full Anti-Hero status when Claire releases her to help fight the Indominus rex.
• Adaptational Jerkass: While still a huge threat who kills several other dinosaurs and is indirectly responsible for the death of Hammond in the novel, she doesn't actually straight-up kill anyone, as opposed to the film where she rips Donald Gennaro in half. Then again, Gennaro had it coming. And in the end, Rexy actually ignores the humans in favor of bigger and more interesting prey: two Velociraptors. Her only confirmed human kills afterwards can be counted in one hand: none other than Eli Mills and Mitch, who more than had those deaths coming.
• Adaptational Villainy: Rexy is depicted in a more antagonistic light in video games, most notably Telltale's Jurassic Park: The Game, where she constantly hounds Dr. Gerry Harding and his daughter Jess, not to mention she's more persistent than her appearance in the movies. Older Jurassic Park games like the arcade game licensed by Sega as well as Rampage Edition also follow this direction, making Rexy an unstoppable predator hellbent on eating the player.
• Advancing Boss of Doom: She's this in Grant's final level in Rampage Edition whereupon surfacing, there is no turning back, and players are forced to use any weapons they have to keep Rexy at bay as she relentlessly chases after Grant's raft. Failure to stop her would result in Rexy chomping down and devouring Grant, costing the player a life. She plays a similar role in the T.rex Carnage mission in Jurassic Park 2: The Chaos Continues- here the player has to keep her from getting to close to their jeep.
• Advertised Extra:
  • She appears in PlayStation version of The Lost World: Jurassic Park, but only in the special edition and in the first level, which takes place in Isla Nublar, with the intent to allow players to demonstrate the awesomeness of playing as a Tyrannosaurus. After that, you're playing as a Compsognathus and Rexy is never seen again, with the main playable tyrannosaur being the Buck.
  • Despite heavy advertisement showing her in Camp Cretaceous, her only appearance in Season 1 is in a video game during the pilot. Justified, given that she would be locked in her enclosure for most of the season.
• Animals Not to Scale: Downplayed. She's portrayed as noticeably larger than the largest known Tyrannosaurus specimens in real life, particularly in the later films. The largest real-life T. rex is estimated to be about four meters tall and just under thirteen meters long, but Rexy is portrayed well over five meters tall and closer to fourteen meters long. Notably, while she's (fairly) consistently portrayed as being unusually huge in canon, being the only tyrannosaur to outsize the Spinosaurus^note Interestingly, it's recently been proposed that the maximum size range of Tyrannosaurus was likely up to 50% larger than the biggest known specimens, meaning it would be entirely possible (if exceptionally rare) for an individual Tyrannosaurus in real life to rival or even surpass Rexy in size.
  • Interestingly, while she's definitely very long for a T. rex, her canon weight of 7 tons is actually quite a bit lighter than a T. rex of her prodigious size would be. She should weigh in the ball park of 11 tons at least. This is a case of Science Marches On as scientists have found that T. rex was considerably more bulky than they were thought to be in the 90s.
• Anti-Hero: While a ferocious predator, she does indirectly play the role of a hero who ends up saving human lives, if mainly because there's a much more dire threat that even she sees as more trouble than competition and generally doesn't care much for human lives unless they either piss her off too much, or they leave her territory. Due to her being the most recurring dinosaur, Rexy is also the main anti-heroine of the franchise
• Anti-Villain: In times where she's the biggest and most active threat to the protagonists, Rexy doesn't recurringly antagonize them and instead prefers to scare them away from her domain. At the end of the day, she's a natural apex predator who hunts for sustenance and is a wild animal with her own needs.
• Awesome Moment of Crowning: In a way, she gets one for each film she's in:
  • In one of the most iconic scenes of Jurassic Park, Rexy—after throwing the Big One into the T. rex skeleton—turns around and roars in triumph while the "When Dinosaurs Ruled The Earth'' banner falls down as if it's a crown bestowed upon her.
  • At the end of Jurassic World, where she stands atop the highest heliport and roars victoriously, reclaiming her kingdom.
• Bad Guys Do the Dirty Work: Rexy's responsible for killing the Big One and the Indominus rex, both battles resulting in some unpleasant injuries. On the human side, she ate both unrepentant murderer Mills and a would-be big game hunter Mitch. However, she's not much of a baddie since her only motivation for attacking humans is hunger or them being in her territory.
• Bad Vibrations: Her footsteps cause these, heralding her memorable Big Entrance in the first movie.
• Badass in Distress: Rexy is basically this due to her old age in the Jurassic World trilogy.
  • In the climax of Jurassic World, Rexy is slowly getting her ass kicked by the Indominus rex, who would have killed her if Blue had not arrived just in time to distract the hybrid.
  • Rexy spends the bulk of Fallen Kingdom out of action, she is one of the dinosaurs that Claire and Owen have to rescue from an erupting Nublar before she is captured by Wheatley and subsequently imprisoned in Lockwood Manor, escaping only at the very end.
  • In the climax of Dominion, Rexy is briefly knocked unconscious by the Giganotosaurus, and she would have been killed if Kayla had not lured the Therizinosaurus to distract the larger theropod.
• Bash Brothers: Bash Sisters in this case, but Rexy does cooperate with Blue during their battle against the Indominus rex once the latter saves the former from being killed. Not only do the duo win, but they even leave on amicable terms, despite Rexy's bad experience with raptors in the past.
• Behemoth Battle: Specifically, Rexy has one against a Triceratops in the Telltale game, the Indominus rex in Jurassic World, a Giganotosaurus in Dominion, and a Tarbosaurus in Jurassic World Camp Cretaceous: Hidden Adventure. They're about as grand and intense as they're marketed to be.
• Behind the Black: In Jurassic Park, she shows up without sound or anyone even seeing her 'till she snags a raptor out of midair during the climax. Both the raptors and the humans only notice her the moment the viewer does.
• Big Damn Heroes: This is her main entrance in case she's playing the role of an Anti-Hero.
  • While not really paying them attention, Rexy saves the remaining survivors by suddenly ambushing one of the raptors and chomping down on her. With The Big One having diverted her attention to avenge her partner, this allowed the survivors enough time to exit the Visitor Center and leave the island.
  • Inverted in the fourth film where it's Rexy who has to be saved by someone else playing this trope straight, in this case, Blue, who charges at the Indominus before she could land a killing blow, allowing Rexy to recover and fight back.
  • In Fallen Kingdom, Rexy ambushes a Carnotaurus who was attacking a gyrosphere with Claire and Franklin being trapped in it, inadvertently saving their lives alongside Owen's.
• Big Bad:
  • Subverted in the first film. Despite being the star dinosaur, even In-Universe by InGen as well as presenting the first sense of horror and danger, Rexy is ultimately overshadowed by The Big One and her Velociraptor pack, who end up being more recurring and actively malicious threats. If anything, Rexy ends up becoming the franchise's primary Anti-Hero.
  • Played straight in the arcade version of the first film, where Rexy is the main dinosaur threat, chasing you throughout Isla Nublar, and being fought thrice in the first, second, and last levels alongside a second tyrannosaur in the latter. Even then, she remains a Non-Malicious Monster, merely chasing you because, as far as she's concerned, you're easy food and she ends the game being tranquilized and transported, likely to her exhibit.
  • Also played straight in Jurassic Park River Adventure, where Rexy is the main predator throughout the ride, and it's stated that she's stalking the visitors throughout the ride. She makes an appearance towards the end, attempting to attack the raft before it plunges down an 85-foot drop from a waterfall. In the Jurassic World retheme, Rexy is replaced by the Indominus rex, with Rexy herself only making a cameo.
• Big Entrance: In Jurassic Park, Rexy has one of the most famous Big Entrances in cinematic history, preceded by impact tremors and culminating in everyone present looking on in horror as she effortlessly breaks free. In Jurassic World, her entrance is equally epic but tonally distinct. As a combination of ominous drums and an increasingly heroic overture play, her paddock door opens and she strides out of the darkness. The whole scene balances the sense that this animal is as dangerous as the Indominus yet is still presented in the film in a heroic light.
• Bookends: Rexy manages to have these every once in a while.
  • In the first film, the crisis at Jurassic Park begins with Rexy breaking loose and attacking the guests. It ends with her breaking into the Visitors' Center and attacking the Velociraptors that threaten the surviving guests.
  • In the fourth film, Rexy is in her paddock at the beginning. The final shot of the film is her walking up to a helipad and giving out a triumphant roar, signifying her newfound independence as a free animal.
  • Franchise-wide, Rexy is a solitary animal and is never seen with anyone of her own kind, with the implication that Rexy had never encountered a fellow Tyrannosaurus in her life. One of the last shots in Dominion is her encountering two Tyrannosaurs at the Biosyn Valley, namely the Tyrannosaur Buck and Doe from The Lost World.
• Breakout Character: In a sense. She was always intended to be a big part of the film but once the raptors were introduced, she originally disappeared from the rest of the film. When searching for an ending, Spielberg supposedly realized that Rexy was the true star of the flick, and had her endgame rescue added in. She went on to be the most recurring dinosaur in the franchise, appearing in numerous non-canon comics and video games, before returning to the films with the World films.
• The Bus Came Back: There were several other T. rex specimens who appeared in The Lost World: Jurassic Park and Jurassic Park III, but the T. rex in Jurassic World is this original T. rex who is being featured after a 22-year absence.
• Camping a Crapper: By the time Rexy demolishes the restroom stand thanks to Malcolm's botched attempt at distracting her, Gennaro is still sitting on a toilet. Quivering at the sight of the tyrannosaur, Gennaro immediately gives away his position, prompting Rexy to swiftly devour him, with the toilet getting broken down upon impact.
• Clifftop Caterwauling: At the end of Jurassic World. It's exactly as awesome as it sounds, and the triumphant music that plays during the scene makes it even more awesome.
• Combat and Support: In her team-up with Blue, Rexy acts as the Combat by dealing hard blows on the I. rex while Blue distracts it from fighting properly.
• Combination Attack: Linking to Combat and Support above, Blue's distraction tactics against the Indominus allow Rexy to capitalize on her strength and weight, knocking the monstrous hybrid several times whilst not being able to pay attention to two predators attacking and distracting at the same time.
• Composite Character: There were two Tyrannosaurus rex in the book, an adult and a juvenile. While Rexy is primarily based on the adult T. rex, she also fulfills the juvenile's role of eating the assigned caretaker who abandons Hammond's kids during the breakout. Interestingly, Jurassic World's website mentions that the old T. rex paddock was intended to house both an adult T. rex and a juvenile one.
• Cool Old Lady: By the time of the Jurassic World trilogy, Rexy is very old by Tyrannosaurus standards, but she is still a powerful and experienced predator as the Indominus rex, a Carnotaurus and a Giganotosaurus all learned the hard way.
• Covered in Scars: Over her thirty years, Rexy has been in the wars once or twice. There are the injuries on the left side of her back, neck, and jaw gained from The Big One in Jurassic Park. She's also got a large number of small scars around her nose and eyes likely gained from living in the wild and several big cuts along her right side and her legs, corresponding to some of her Indominus wounds.
• Curb-Stomp Battle: Her "fight" against The Big One can easily be summed up as this. The only reason Rexy has blood drawn on her is that The Big One attacked first in a moment of distraction when the tyrannosaur was to feast upon her raptor companion that she killed. The moment Rexy lands a good bite on The Big One, the fight is immediately over.
• Curb Stomp Cushion: Her fight against the Indominus rex is this. Unlike Owen's Raptor Pack, Rexy manages to score a few good rams and bites, even drawing first blood on her opponent. Unfortunately, the Indominus, having literally been designed to be stronger than a T. rex, manages to overwhelm and pin down her adversary shortly after. Rexy would have died had it not been for Blue's sudden interference.
• Demoted to Extra: In Fallen Kingdom Rexy doesn't get as much screen time or focus as she does in the previous film, spending most of it in captivity by Mills' goons. Even then, she does get the killing blow on Mills, if mainly by sheer coincidence.
• Disk-One Final Boss: Much like her novel counterpart, Rexy is introduced to be the main dinosaur threat, having come very close to killing the heroes on two occasions. However, she takes a backseat and the Velociraptors end up becoming the primary threat to be dealt with. Unlike the novel, Rexy isn't put out of commission, but rather makes a sudden anti-heroic move by killing the remaining two raptors when they got the heroes covered.
• Destructive Savior: Rexy and Blue are the ones to defeat the Indominus rex, saving the heroes and allowing the survivors to return to their homes peacefully and the dinosaurs to once again claim Isla Nublar for themselves for the next three years, albeit at the cost of Rexy destroying several buildings in Jurassic World, though by that point, the park was forced to become completely defunct.
• Disney Death: She appears to have died in the climax of Dominion, getting trounced by the Giganotosaurus. But when the Therizinosaurus draws the Giga's attention, Rexy's motionless body suddenly moves and attacks the Giga while it is distracted.
• The Dog Bites Back: After being bullied out of her meals by the Gigantosaurus in Biosyn's Sanctuary, Rexy gets her revenge by driving the Giga into the piercing claws of the Therizinosaurus.
• The Dreaded: She inspires a nervous silence in the control room even before she breaks out. Once she does, everyone on the island soon decides to nope the hell out of there the minute she shows them she really means business. This saves their lives. The Big One, who, for some reason, decides not to run away from the very large and very dangerous dinosaur, dies at her hands — well, teeth, anyway. Later, during the events of Camp Cretaceous, she's very much at the top of the food chain on post-abandonment Isla Nublar, and so much so that a mixed species herd of dinosaurs (including giant Brachiosaurus) which had been stampeding in one direction promptly turn around the other way the moment they see her.
• Earn Your Happy Ending: Rexy has lived in solitude for more than 30 years, surviving against the odds multiple times. After finally defeating her most primordial rival, her story ends with her encountering members of her own species for perhaps the first time in her life, with the implication being that she will spend her final years as part of a family.
• Enemy Rising Behind: Rexy gets a great one of these after recovering from the Giganotosaurus's assault, slowly rising into view behind the larger theropod as it's distracted by the Therizinosaurus.
• Exit, Pursued by a Bear: Seemingly a favorite of Rexy, being the eventual dispatcher of the main villains in Jurassic Park and Fallen Kingdom. Subverted in Jurassic World, where Claire attempts to invoke this against the Indominus rex, but it's ultimately the Mosasaurus that gets the honor of finishing it off.
• Fearsome Foot: Its first appearance puts a particular emphasis on her foot, particularly when she has Grant and Lex cornered and is curious about them. Its currently the Trope Image.
• Final Boss: In licensed games based on the first film, Rexy is often the last opponent Dr. Grant has to deal with. Notably, there's no way to actually kill her, all Grant can do is stay far away from her until the end of the level.
• First Blood: In the fight against the Indominus, Rexy draws first blood.
• Foe-Tossing Charge: After getting a second wind in her fight against the I. rex, Rexy hurls it against the fence around the Mosasaurus' lagoon. She pulls this out again after recovering during her fight with the Giganotosaurus, taking the opportunity to tackle it when it's distracted by the Therizinosaurus and throws it onto the other dinosaur's claws.
• Force and Finesse: In the battle against the Indominus, Rexy serves as the force to Blue's finesse, utilizing her great strength and weight to deliver damage and knockback while Blue is lithe, but acrobatic and intelligent, using her wits and agility for distraction.
• Generation Xerox: Just like her Cretaceous ancestor, Rexy has a rivalry with a Giganotosaurus. However, her ancestor was killed by her rival, while Rexy survives and is able to kill hers.
• Genetic Memory: The Extended Edition of Dominion implies that Rexy remembers how her Cretaceous ancestor fell to a Giganotosaurus millions of years ago, and that memory is enough to give her Heroic Second Wind against her modern adversary.
• Giant Equals Invincible: Rexy is this in the older Jurassic Park licensed games where all the player can do is shoot and bombard the tyrant lizard in an effort to daze or slow her down. No matter how much is thrown at her, Rexy isn't going to die.
• Go Fetch: On the receiving end of this, twice in a row. Grant draws a flare and throws it away from the jeep Rexy was attacking, saving Lex and Murphy. Malcolm tries the same thing, and it fails horribly, resulting in Malcolm getting injured and Gennaro getting eaten.
• Godzilla Threshold: She's the "Godzilla" in this case as while Owen, Claire, and Lowery are desperate in bringing down the Indominus after she kills most of the raptors, Gray suggests "more teeth", giving Claire the idea to release Rexy in an effort to better their chances of fighting the Indominus back. It pays off with Rexy and a surviving Blue contributing to the Indominus's death, saving Isla Nublar, the dinosaurs, and survivors of Jurassic World.
• Good Scars, Evil Scars: Her scuffle against The Big One in the first film, while one-sided on Rexy's part, saw her endure everlasting scars from where the raptor attacked her. Nevertheless, the scars show off her age and reputation as a battle-hardened dinosaur, predator, and an Anti-Hero. She gains more scars after her fight against the Indominus.
• Hair-Trigger Temper: Her Aggression Index is listed as "High". The former statement is not an understatement and comes in very handy in Jurassic World in the fight against the Indominus rex.
• The Heavy: She's the most recurring dinosaur and the first one to attack the protagonists, splitting them up, but she's Demoted to Extra in favor of the raptors. She ironically helps save the protagonists in the end by killing the raptors attacking them.
• Hell Is That Noise: She has two of note in the first film; one includes the loud, thunderous footsteps she makes to announce her arrival, which all characters treat with quiet dread when they hear it. The other is her roar, which is shown to be deafening up close and likely to strike terror in any human who hears it.
• Heroic Second Wind:
  • She takes a severe beating in the opening blows of the fight with the Indominus rex (getting body slammed, savagely mauled on her flanks, and thrown headfirst into a souvenir booth). Blue's intervention not only saves her life but when Rexy re-enters the fight, she's slamming the Indominus through buildings and throwing it like a ragdoll.
  • Similarly, after getting knocked unconscious by the Giganotosaurus, the intervention of the Therizinosaurus keeps her from being finished off and she comes back into the fight and quickly takes advantage of the situation.
• Historical Badass Upgrade: Zig-Zagged. Rexy has vision problems in the first film unlike the real deal and scientific studies since the film's release suggested the real-life T. rex was just as tough if not tougher than Rexy when it comes to combat. However, Rexy has two key advantages over her real-life counterpart: 1) As Zia Rodriguez points out, she can live significantly beyond the lifespan of a real T. rex thanks to modern healthcare provided by her caretakers. And 2) She can run up to 32 MPH while the real animal is generally believed to have been only capable of about 12 MPH.
• How the Mighty Have Fallen: Played With; Rexy was the dominant carnivore on Isla Nublar for almost 3 decades. At the Biosyn facility in the Dolomites, she's suddenly in direct competition not with a psychotic killer but another apex predator; one that's bigger, younger, and fitter than she is. When she attempts to defend a deer carcass from the Giganotosaurus, she's quickly driven off. But as she demonstrates in the finale, she's not willing to fully give up the crown without a fight and demonstrates she's capable of taking it back using her experience as much as anything else.
• The Juggernaut: Once she gets going, she is relentless and completely unstoppable, smashing through any obstacle that gets in her way, whether it be a tree while chasing a Jeep, or a Spinosaurus skeleton while pursuing Claire.
• Just Desserts: As a known Man-eater, she has been on the delivering end of this onto several human jerks including Eli Mills, Mitch, and Gennaro.
• Know When to Fold 'Em:
  • During the jeep chase, Rexy gives up on chasing the vehicle as soon as it reaches a speed she can't match, rather than waste the energy.
  • In a Dino Tracker video, Rexy attacks an Apatosaurus herd. When the adult member she engages into battle hits her with a powerful warning tail whip, she promptly retreats afterwards, recognizing they're too dangerous to hunt.
  • After being bitten in the snout by the Giganotosaurus when fighting it over a deer carcass, Rexy figures it's too much trouble to be worth it and merely walks away before she can receive further injuries from the larger theropod.
• Large and in Charge: Rexy is the largest Tyrannosaurus and the third biggest theropod in the franchise (only the Giganotosaurus and Indominus are bigger. The Therizinosaurus is slightly taller but not as heavy). She's also regarded as the uncontested top of the Isla Nublar food chain, dwarfing all other predators and capable of bringing down even the giant sauropods on the island.
• Last of Her Kind: Born in 1988, the oldest among seven Tyrannosauruses, Rexy has outlived all of her known "siblings" and is the last known surviving dinosaur from the 1980s and the original park. It was thought she was the last of her species due to reports that Isla Sorna's ecosystem had been destroyed, as was believed and reported on by the Dinosaur Protection Group; but this was revealed to be untrue with Mantah Corp's captured Tyrannosaurus being from Site B. She later encounters the Buck and Doe T. rexes in the abandoned Biosyn Valley.
• Let's You and Him Fight: Rexy is bought into this by Claire in a desperate plan to release and bring along a large predatory dinosaur to fight the Indominus rex, who has been wrecking Isla Nublar nonstop since her escape. When the two finally confront each other thanks to Claire throwing a flare she used to guide the tyrannosaur unto the hybrid dinosaur, Rexy starts off with a bellowing roar before drawing first blood.
• Lightning Bruiser: Hammond clocked her at 32 miles per hour. She's also very big... and apparently resilient to trees. Throughout the Jurassic World trilogy, she is incredibly fast and vicious for a rex of her age and size.
• Living Motion Detector: Dr. Grant once touted a scientific theory that the vision of a T. rex is based on movement, and Rexy seems to prove that theory when she fails to find the motionless Grant and Lex. But since this theory has been the subject of ridicule in real life, Rexy's vision problems have been quietly dropped since her return in Jurassic World.
• Made of Iron: Even though Rexy took a rather savage beating from the Indominus at the beginning of their throwdown in the climax, once she got a moment to recover, she was unhindered and, if anything, just seemed more pissed off by her injuries than anything else. Likewise, the final scene of Jurassic World shows Rexy to be in excellent shape in spite of her age and injuries from the Indominus.
• Mascot: The face of Jurassic World. In fact, when Dr. Wu talks about the motivation for engineering the I. rex, he says that the park "needed a new T. rex".
• Mascot Villain: Downplayed; Rexy does try to kill the kids and is an extremely dangerous force of nature in the first film, but that's because she's a predator who's acting out of her own natural instincts, not to mention it's the Big One and her Velociraptor pack that are the main threat to the protagonists. Further subverted when Rexy ends up becoming an Anti-Hero, though she does have her moments of being an Anti-Villain.
• Mighty Roar: She unleashes one of the most well-known (and most used) in cinema. She still has it by the time of the Jurassic World trilogy.
• Never Mess with Granny: Almost three decades old by Jurassic World and the oldest known living dinosaur. An elder by T. rex standards (the longest-lived T. rex found was 28), Rexy's a bit more gaunt and scarred, she's missing a few teeth, and her walk is noticeably stiffer. In Fallen Kingdom, it's even shown that her roar, while still sonorous, isn't quite what it used to be. But she still puts up a better fight against the Indominus than any other opponent and plays a major role in finally defeating it. Interestingly, Zia noted that through a combination of a life half-lived in captivity and the cloning process, it's likely that Rexy will probably live beyond a natural lifespan. When she eventually encounters the Giganotosaurus, she is 34 years old — a minimum of 30 years older than the other dinosaur — but puts up a solid fight and uses her experience to take advantage of an opening to quickly finish her opponent off.
• Nice Job Fixing It, Villain: She's not technically a villain — she hunts only when she needs to — but she noms the raptors in the first film. In that situation, nomming the raptors is a good thing. Also, contributing to the demise of the Indominus rex. This is a good thing, a very good thing.
• No-Holds-Barred Beatdown: Despite getting the first hit and displaying a better fighting chance than the Raptor Pack, Rexy still ends up on the receiving end of the trope from the Indominus, who proceeds to thrash the tyrant lizard around with a little effort and maul her to death's door, only being saved by a timely intervention from a still-living Blue.
• Nominal Hero: While not exactly on the heroes' side, Rexy does see any antagonistic dinosaur as a threat and villainous humans as potential prey. Her killing The Big One, Mitch, and Mills is basically her putting a stop to a major threat. Of course, there's also her battle against the Indominus and the Giganotosaurus which ends up saving the heroes' lives.
• Non-Malicious Monster: Although Rexy breaking out is what kicks off the start of the disaster in the first film, ultimately she's just a predatory and territorial animal rather than a true villain. In fact, near the end, she saves Alan and the rest when she attacks and kills the Velociraptors that were about to attack them. Even in Fallen Kingdom, when she and Owen wind up trapped in a container, her reactions are her understandably freaking out rather than trying to eat him.
• Older Hero vs. Younger Villain: Rexy is an anti-hero at most, but given she's 30 years old by that point and a relic from the Jurassic Park days, she qualifies in comparison with any adversaries she faces off in the Jurassic World Trilogy. In Jurassic World, she competes against the Indominus rex who was recently created for the titular park to renew the titular park's popularity with hybrid dinosaurs, and in Dominion, Rexy challenges a Giganotosaurus created by Biosyn a couple of years ago by estimate.
• One-Hit Kill: Being a Tyrannosaurus having the most powerful bite out of any land animal means a single chomp makes nearly anyone a goner if they're caught. In video games, Rexy's bites will enforce that you will die instantly and start a level all over again.
• Quizzical Tilt: She does this occasionally in the first film, mainly due to her curiosity in not having known about humans all that much. She does this to Lex and Tim's jeep to assess whether she could attack it and again to Gennaro upon exposing him by destroying the restroom, expressing curiosity upon him before lunging for the kill.
• Recurring Boss: In the licensed arcade game of the first film, Rexy is fought three times, specifically in Levels 1, 2, and 4. For bonus points, she's the first and last dinosaur you fight against.
• Retired Badass: By Jurassic World, Rexy is already past her prime and seems content with a semi-domesticated life. On a meta-level, Colin Trevorrow compares her appearance in the film and her battle against the Indominus as her personal Unforgiven.
• Rightful Queen Returns: In Jurassic World, when she's called upon to help save the day.
• Roar Before Beating: She roars occasionally before attacking her enemies and prey. She announces her presence in this way before the two jeep attacks in the first film and when confronting the Indominus for the first time during the 2015 Isla Nublar Disaster.
• Scars Are Forever: The main clue that she is the same T. rex as always is the presence of scars corresponding to the raptor fight in the climax of the first film. She picks up a bucketload more following her fight with the Indominus, but Rexy gave as good as she got.
• She Is the King: "Rex" translates to "king", meaning Tyrannosaurus rex translates to "Tyrant Lizard King." Rexy is female.
• Shown Their Work: In Dominion, she is redesigned with non-pronated hands just like real theropods.
• Signature Roar: Her roar is impossible to mistake for anything else and has frequently been recycled. Ardent fans of the film series will be able to recognize the sounds of the other dinosaurs just as well; some of the notable ones are Brachiosaurus and Velociraptor. Interestingly, the iconic high-pitched, almost pinched sound in Rexy's roar was provided by a baby elephant's first attempts at trumpeting. The rest of it was built out of a lion, a tiger, and an alligator.
• Spared by the Adaptation: In the original novel, Rexy is taken out shortly before the novel reaches its Darkest Hour, succumbing to the tranquilizers that Muldoon fired upon her two hours ago. She is never seen or mentioned again after she passed out and, according to Wu and later the population count, most likely drowned in the pool she was in. The Costa Rica napalm bombings made double assurance of her demise. In the Jurassic Park movie, none of these two events occurred, which allows Rexy to reach the Visitor Center in time to rescue the protagonists from the raptors and later allows the Masrani Global Corporation to move her to a new exhibit enclosure in Jurassic World where 22 years later, she would be released to fight the Indominus rex.
• Stealthy Colossus: The T. rex, whose presence throughout the first film has been indicated by earth-shattering footsteps, manages to get into the Visitor Center without anyone noticing, before attacking the raptors. In Fallen Kingdom, she is shown to ambush her prey without warning, best demonstrated with Mills at the climax of the film.
• Strong and Skilled: The Indominus was a powerhouse with no real fighting experience that relied on its size and adaptability to win fights. Rexy is incredibly strong and has also lived in the wild for a decade before Jurassic World opened. She's much more experienced in a fight and shows it, being capable of completely changing her fighting tactics once she's recovered from her first round with the hybrid. Shows this again when fighting the Giganotosaurus as rather than charging in once she's recovered from the initial takedown, she waits for the other theropod to be distracted and goes for a single hit kill.
• Super-Persistent Predator:
  • Subverted; Rexy does chase after anything she can sink her jaws onto, but she does show some restraint and will back away if the effort is not worth it. For example, she chases a rescue jeep sent out to rescue Grant, Malcolm, Lex, and Tim, but eventually stops after the jeep leaves her territory. In Dominion after getting her snout mauled by the residential Giganotosaurus over a deer carcass, Rexy leaves, figuring that fighting against a rival predator over a small corpse is pointless.
  • Played straight in Jurassic Park: Rampage Edition, where Rexy gives chase to Dr. Grant in the final level and won't stop until the player reaches the end. All Grant could do is use whatever weapons he has to slow Rexy down before she could catch and devour him.
• Super-Strength: Even for a dinosaur her size, Rexy is monstrously strong. During the fight with the Indominus, she twice demonstrates this, first by grabbing the 10-tonne animal in her jaws and physically hurling it several dozen feet and then following up by tossing it a similar distance using her head. Her being able to topple the Indominus is one thing but she's essentially able to lift her own entire body weight plus change and hurl it through the air. In her final battle against the Giganotosaurus, Rexy uses all of her strength to push the larger theropod into the claws of the Therizinosaurus.
• Tag Team: With Blue against the Indominus at the climax of Jurassic World. They prove to be more formidable than the hybrid monster, bringing it close to defeat before the Mosasaurus claims the kill.
• A Taste of Power: A variant of sorts; the first level in the special edition of the PS1 Lost World game takes place during the 1993 Isla Nublar Downfall and with Rexy as the playable character to deliver the promise of players being able to play as a T. rex. Upon completing the level, the play immediately switches to controlling a Compsognathus and while Tyrannosaurus would eventually become playable again, it is a different one, namely the Buck from Isla Sorna.
• Terrifying Tyrannosaur: She invokes nervousness from the Jurassic Park staff and her literal breakout debut on the silver screen redefines what it means to be scared by a T. rex. Rexy is also the most powerful T. rex of the franchise and even in her old age during the Jurassic World era, she can put up a fight against larger therapods and still hunt humans for a quick snack.
• The Tooth Hurts: When she attacked Lex and Timmy's explorer, she struck the roof with such force that she snapped one of her front teeth off. This gives her a prominent diastema which serves as one of her distinguishing traits.
• Theme Music Power-Up: A variant; the music during the Velociraptor chase in the Visitor Center is intense and scary, especially when the raptors have the heroes cornered... until Rexy suddenly kills one of the raptors, immediately followed by the Jurassic Park Theme playing, signaling some sort of hope and chance being given to the human survivors.
• Unstoppable Rage: She's already furious when she sees the I. rex intruding on her territory. But after receiving a savage beating and Blue giving her a Heroic Second Wind, she goes full-on berserk and gives the I. rex an even more intense beatdown.
• Use Your Head: She is willing to use her skull as a battering ram if need be. She does this to a Spinosaurus skeleton before encountering the Indominus, and she uses it offensively against her as well as the Giganotosaurus in Dominion when they finally start throwing down. In Fallen Kingdom, she headbuts an unsuspecting Carnotaurus, inadvertently saving Owen, Claire, and Franklin.
• Victorious Roar: After defeating the Big One, the Indominus, the Carnotaurus, the Giganotosaurus and the Tarbosaurus across all of her film appearances thus far, she always lets off one of her famous roars.
• Villain Killer: Rexy eats the Dirty Coward lawyer Donald Gennaro and the Corrupt Corporate Executive Eli Mills.
• Vocal Evolution: Her roars in Fallen Kingdom and Dominion sound deeper, more guttural, and more bellow-like to emphasize her old age.
• The Worf Effect:
  • Briefly, in World; the I. rex puts down a massive beating on the old girl when they initially face off. Justified since the I. rex was tailor-made with all of her strengths and more, as well as because Rexy was initially fighting as she would in a territorial fight, whereas the I. rex was fighting to kill from the start; it takes an assist from Raptor Blue to give her a second wind.
  • She's on the giving end in Fallen Kingdom. As the Carnotaurus is menacing our heroes, Rexy comes out of nowhere, grabs it by the neck, and pins it to the ground. The real icing on the cake is that she doesn't deliver the final blow with her infamous jaws, she kills the Carnotaurus by simply lifting one foot to walk away, leaving all of her considerable tonnage on the poor animal's neck.
  • When she first encounters the Giganotosaurus, after a brief struggle she retreats rather than fight, highlighting the power of the new dinosaur while also setting up the later battle for the apex position.
• Worthy Opponent: She appears to regard Blue as this, as she shares a look with her after they've defeated Indominus and they peacefully go their separate ways.
• Would Hurt a Child: Tim and Lex were the very first individuals that Rexy attacks on-screen. Interestingly, while a horrifying scene, it doesn't really villainize Rexy too much, so much as it displays how ferocious she is as a predator. She's acting more out of curiosity than any malice, but Grant and Malcolm thankfully put a stop to that... with a whole slew of new problems. On another note, Rexy does antagonize a baby Triceratops in the Telltale game as well as threatening the Campers in Camp Cretaceous.

The T. rex Family

Tyrannosaurus rex Family ("Buck", "Doe", "Junior")

"Mommy's very angry..."

Appearances: The Lost World: Jurassic Park | Jurassic World Dominion

"All I want in return for my services is the right to hunt one of the Tyrannosauruses. A male, a buck only."

—Roland Tembo

A family of T. rexes, consisting of a father, a mother, and a baby.

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• Anti-Villain: While they do eat humans and the Buck goes on a rampage in San Diego, they are just a family trying to protect their baby.
• Ascended Extra: Of a sort. While the T. rex in the first film was a major presence, the Tyrannosaurus family in this film is the driving force of many of its events and fills the Velociraptors roles as the primary dinosaur antagonists.
• Badass Adorable: The baby.
• Badass Family: They're a family of Tyrannosaurus rexes, after all. Dominion implies Rexy, the Tyrannosaurus from Nublar, joined in sometime after her arrival to Biosyn valley or her battle with the Giganotasaurus.
• Battle Couple: Together, they are easily the most formidable creatures on the island.
• Big Bad Ensemble: With Peter Ludlow during the second film, however, the Buck becomes the biggest threat once it goes on a rampage in San Diego to find his baby.
• The Bus Came Back: After 25 years, Colin Trevorrow confirmed on Twitter that the Buck and Doe are the two T. rexes that welcome Rexy into their family in the abandoned BioSyn Valley.
• The Comically Serious: The adults are more serious antagonists than Rexy. This makes it all the more shocking when the Buck has silly moments like drinking out of a pool.
• Contrasting Sequel Antagonist: Most obviously by being a family and having a distinct reason to continue pursuing the characters, both of which contrast Rexy in the first film. They also contrast to the Big One and its pack while they are a pack of raptors born on Isla Nublar for the original park, the Rexes are obviously a family of T. rexes, while the Big One and her raptor pack were killed, the T. rex family live by the end of the second film.
• Cub Cues Protective Parent: See the baby? Don't touch it unless you want to become T. rex chow.
• Darker and Edgier: The parents are downright scarier than Rexy. They sound angrier as they are, they wouldn't leave the humans alone, and they caused more deaths than Rexy did. Gee, do you think people messing around with their baby had something to with that?
• The Dreaded: Two angry T. rexes who are also parents are the kind to seriously watch out for, especially due to their tracking skills and if someone tries to steal their baby.
• Dual Boss: In the PS1 game, Sarah Harding has to fight against the Buck in the final level upon ending up in a cargo hold, who is then joined along by the Doe once the former receives enough damage.
• Escaped Animal Rampage: In the final climax, the male gets loose from its holding cell on the cargo ship and, hopped up on stimulants, goes on a destructive rampage through San Diego.
• Evil Counterpart: While not evil, Buck is this to Ian, in that they are both highly protective of their children. The scene in the RV is a good example. When Sarah points out that her theories on T. rex's parental instincts are correct, Ian panics because he realizes what he would do if someone tried to hurt his daughter.
• The Family That Slays Together: To the point where we see the father teaching his son how to hunt.
• Final Boss: The duo tends to be the final enemies to fend off against in any licensed video games of The Lost World.
  • The Buck Tyrannosaurus is the last opponent the player fights against in the Arcade version of the game.
  • In the PS1 game, the player as Sarah Harding has to fight against the Buck in the cargo. Once enough damage has been dealt, the Doe joins the battle.
• Good Parents: Part of Sarah's dispute with Burke is their opinions on Tyrannosaurus nurturing habits. Burke's is that a T. rex would abandon its young at the earliest opportunity. Sarah's is that they were very involved in the development of their offspring. Over the course of this film, Sarah is proven right, as not only are both parents pissed when their baby is taken but the father is even shown teaching the infant how to make a kill. Said kill being Ludlow.
• Handicapped Badass: The baby after he's injured.
• Hero Killer: The parents rip poor Eddie in half and eat him.
• Killed Offscreen: Since Rexy is confirmed as being the last Tyrannosaurus left by the time of Jurassic World: Fallen Kingdom, it was assumed these three are dead. Jurassic World Dominion reveals that this is not true for the Buck and the Doe, as both appear in the BioSyn sanctuary. What happened to Junior, however, is still a mystery.
• Lightning Bruiser: They are huge, strong, and very fast. The Buck can plow through a wall without even slowing down while keeping pace with a speeding car.
• Mama Bear/Papa Wolf: The parents. If you mess with their baby, they will track you across the island to eliminate you as a threat. The moment the father, already amped up thanks to the stimulant cocktail it was given on the ship, sees Ian and Sarah have the offspring in their car, it instantly stops rampaging in San Diego and gives chase, roaring in rage.
• Non-Malicious Monster: The parents just want to save their baby. All three of them want food.
• The Nose Knows: The father sniffs out some of the humans at some points. He's also shown catching a whiff of his nearby infant when Ian and Sarah attempt to lure him away amidst his San Diego rampage. This ends up being one of the reasons the Buck and the Doe continue to follow the humans around the island, due to Sarah idiotically still wearing a jacket stained with the blood of their injured infant.
• No-Sell: When attacking the hunters, they are shot at with automatic weapons. The guns aren't powerful to do any damage, the rexes don't even react to them.
• Offscreen Moment of Awesome: The Buck has one during his transportation to San Diego on the S.S. Venture when he manages to escape his containment and kill all the crew of the ship.
• Sequel Escalation: The first film had one T. rex, which was enough trouble for the humans, but now there are two of them (plus a baby).
• Sequential Boss: In the final level of the arcade game, Something has Survived, the player battles against the Tyrannosaur Doe upon them retrieving their infant and destroying the trailer. Upon defeating the Doe, she calls her mate, who reacts accordingly and becomes the game's Final Boss.
• Sex Shifter: This applies to the Buck. Since Rexy, the Buck and the Doe (and potentially Big Eatie, whose exact age is unspecified) are the only known T. rexes old enough to have been from Ingen’s original generation of seven cloned Tyrannosaurs, with the Buck being the only male out of the trio (or quartet). Meaning the Buck must have originally been female before undergoing the gender-swapping process prior to the events of The Lost World since all of Ingen’s animals were originally cloned as females.
• So Proud of You: The father certainly appears to feel this way as his son kills Ludlow. He even seems to be smiling.
• Super Persistent Predators: Even after their baby has been given back to them, the parents don't go away and keep chasing the humans. Perhaps they found Eddie very tasty and want more...
  • In fairness, it's stated that the rexes still see the remaining humans as intruders upon their established territory and that the kidnapping of their infant caused them to extend that territory wider. Plus, the infant's blood on Sarah's jacket ends up attracting them due to their strong sense of smell. Even when they attack the combined parties, it's still not exactly hunting behavior given that they could have simply started snacking on the mass of sleeping humans all around them and the Doe is simply chasing them out of what she considers their territory, only eating Burke when he literally runs right into her jaws.
• Super-Toughness: Displayed more so than Rexy in the first film, the adults are tough. The Buck, while wreaking havoc in San Diego, rams his head into a bus and smashes it without getting a scratch on him.
• Terrifying Tyrannosaur: What's worse than a Tyrannosaurus rex? A T. rex couple that will lay vengeance upon every human they see for getting close to their baby. Their terrifying reputation is also why Roland Tembo agreed to help InGen capture the dinosaurs of Isla Sorna. He wants to hunt what he deems to be the greatest predator that has ever walked the earth, the Tyrannosaurus rex. Specifically, the Buck.
• Trampled Underfoot: The Doe squishes Carter underneath her foot in a puddle, whose body does not come off until after her third step.
• Unstoppable Rage: When they think their baby is in danger and kidnapped, barely anything can slow them down. The Buck plows through a large portion of San Diego in doing so.
• Worthy Opponent: Roland Tembo sees the Buck rex like this.
  Roland: Somewhere on this island is the greatest predator who ever lived. The second greatest predator must take him down.
• What Happened to the Mouse?: It's unknown what happened to them after the events of The Lost World: Jurassic Park. Jurassic World: Camp Cretaceous has only confirmed that besides Rexy, Big Eatie and Little Eatie are the only known surviving Tyrannosauruses from Isla Sorna. Dominion reveals that the Buck and Doe are still alive, and that they were taken to the BioSyn valley. Junior, who would now be a fully mature adult, his fate however is still uncertain.

"Bull" Tyrannosaurus

Tyrannosaurus rex ("Bull")

"Nobody. Move. A muscle."

Appearances: Jurassic Park III

A young adult male Tyrannosaurus rex that Grant and company run into while escaping the plane crash. It proceeds to chase them, only to run into the Spinosaurus and get into a fight with the larger predator. It puts up a good fight but ends up killed.

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• Adaptational Badass: In the arcade version of the third film, the Bull manages to knock the Spinosaurus off a cliff. While it doesn't kill its rival, the Bull did at least score some kind of win.
• Ascended Extra: It only has a brief appearance before getting offed unceremoniously. In the arcade version of Jurassic Park III, it manages to actually beat the Spinosaurus by throwing it off a cliff and remains to fight the player as the boss of Stage 4.
• Behemoth Battle: Has one against the Spinosaurus, though in spite of putting up a good fight, it's defeated and killed.
• Curb Stomp Cushion: Despite only lasting about a half-minute against the Spinosaurus, it still manages to get the first takedown and multiple hits in to make the Spinosaurus work for its win.
• Demoted to Extra: After the T. rex being the star of the franchise for two films, this one exists essentially to be killed and replaced by the Spinosaurus, to show how deadly the new dino is.
• Neck Snap: How the Spinosaurus kills it.
• Roar Before Beating: The tyrannosaur roars immediately upon seeing the Spinosaurus, showing that he does not like to see a fellow predator intruding on his hunting grounds.
• Spinosaurus Versus T. rex: Despite its minimal role in the third film, it does end up being the Trope Maker alongside the titular Spinosaurus.
• Super-Persistent Predator: Despite having a whole carcass in front of it, the rex decides that chasing and attacking the humans that stumble upon it is a much more interesting thing to do. This causes its death as while chasing them they blunder into the Spinosaurus. Could be partially Hand Waved assuming it mistook the humans for scavengers wanting to steal its meal, but even then it should've stopped chasing them long before it actually did.
• Terrifying Tyrannosaur: Subverted hard. Normally, a T. rex in a Jurassic Park film would be the top predator of the island feared by all. But to highlight how badass the Spinosaurus is to the audience, it gets dethroned very violently and quickly by its new superpredator rival.
• Unskilled, but Strong: Being 37 feet long, this Tyrannosaurus was a subadult and while it does have a sizable corpse, it's shown to be that of a hadrosaur. As shown in its fight against the Spinosaurus, the T. rex is powerful, but it lacks any skill and experience to combat something that is around the same size as itself, let alone a predator that's bigger in comparison. As a result, the Bull T. rex is killed, despite putting up a good effort.
• The Worf Effect: An infamous example, the Tyrannosaurus is the face of the franchise and the filmmakers wanted a dinosaur that could replace it. So, the Tyrannosaurus of this film encounters and fights the Spinosaurus and despite landing several blows that would have killed or crippled it in a potential real-life scenario, the Spinosaurus wins the struggle and kills its opponent.
• Writer on Board: Its treatment in the third film is largely a result of scientific advisor Jack Horner's influence. Horner believed that T. rex didn't "deserve" to be the face of the franchise, and suggested that it be "replaced" with a more suitable dinosaur. Consequently, it is killed off in its only brief appearance. It doesn't even kill anything in the film, only being shown scavenging on an already dead dinosaur— no doubt a reference to Horner's theory that T. rex was a scavenger.

Prehistoric Tyrannosaurus

Prehistoric Tyrannosaurus

Appearances: Jurassic World Dominion

A Tyrannosaurus rex appearing in a flashback taking place in the Cretaceous Period, showing the animal as it naturally looks without any InGen modifications.

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• Behemoth Battle: Enters one with the Giganotosaurus after it approaches and challenges it.
• Bullying a Dragon: It tried to intimidate and attack the equally huge Giganotosaurus, an act that didn't wind up working out for it.
• Feathered Fiend: The most blatant distinction between this animal and the InGen stock cloned from it is the natural creature sporting a layer of short feathers across its neck, shoulders, and dorsum.
• Goofy Feathered Dinosaur: Blatantly averted. The feathers on it are subdued, but not at all hidden, and it's made clear that this is just as much a bonafide apex predator as the InGen stock we had seen.
• Legacy Character: Strongly implied to be the T. rex that contributed the majority of Rexy/Roberta's DNA, and possibly also all Tyrannosaurus made by InGen including Buck and Doe.
• Shown Their Work: This Tyrannosaurus isn't entirely scaly like the InGen version, as the genus was very firmly nested within a group known to have feathers. Since the fossil record has nevertheless demonstrated that Tyrannosaurus was predominantly scaly, the film's depiction has only a sparse coat of filaments along its neck, arms, and dorsum as opposed to the Yutyrannus-like full-body covering seen in some obsolete reconstructions. It also lacks pronated hands.
• Terrifying Tyrannosaur: Unusually for the franchise, subverted (albeit in a much more subtle manner than Jurassic Park III). While this Tyrannosaurus is definitely a fearsome and formidable carnivore just like the real animal and its "descendant" Rexy, it's clear that in its natural environment it's just another predator which (as its battle with the Giganotosaurus shows) is far from invulnerable and has rival predators to contend with.

Big Eatie and Little Eatie

Big Eatie and Little Eatie

Appearances: Jurassic World: Camp Cretaceous

A mother and daughter duo of Tyrannosaurus that formerly lived on Isla Sorna before being stolen and relocated to Mantah Corp island.

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• Androcles' Lion: Possibly. Big Eatie arrives to fight the Spinosaurus, who is under Daniel Kon, just as it is menacing Darius. Whether this was her intentionally trying to protect him or just wanted to settle the score with the rival predator is ambiguous.
  • It should also be noted that Big Eatie takes a moment to look at Darius (who is in a vulnerable position after he freed her from Daniel Kon's mind control) before walking away, seemingly realizing that he freed her.
• Artistic License – Biology: Big Eatie should probably be more naturally aggressive to her daughter by this point, as large predators tend to kick their young out once they reach adulthood to avoid competition for scarce food. Even social predators like wolves, which evidence suggests at least some Tyrannosauruses were, usually have family fission during the point of the offspring's full maturity. Realistically, Little Eatie should become more independent and would try to start her own family.
  • Potentially justified as their unusual living circumstances as the only two rexes on the island and the constant steady supply of food may have impacted Big Eatie's instinctive need to chase off Little Eatie as perceived competition. Her extreme attachment to her daughter, however, is a bit anthropomorphizing.
  • The idea a predator could serve as the "alpha" of a mixed species group^note especially one made of multiple other carnivore species, herbivores, and juveniles of prey animals, like how Darius claims Big Eatie acts to the raptor pair, Pierce, and the baby herbivores; is completely infeasible in nature.
  • There are no "Water Hole Truces" in nature. Predators not attacking prey around water sources usually only happens when both parties are extremely desperate— in severe droughts, for example. In a lush, wet environment like Mantah Corp's island, a predator would see no need to hold back, and would attack any prey animal that came near it. In fact watering holes are prime hunting territory most of the time as prey are potentially distracted when drinking. Herd animals frequently only drink when they have sentries keeping an eye out for ambushes. At the very least the circumstances are potentially justified in this specific and isolated semi-domesticated ecological situation because the Eaties and the other carnivores are being provided with a steady supply of meat by Mantahcorp and thus have no need to hunt the herbivores.
• Artistic License – Paleontology: Handwaved by the cloning process (which accelerates aging while also extending the lifespan), but fossils indicate that Tyrannosaurus had an aging period equivalent to humans (start out small and grow gradually, puberty starts at 13, and adulthood reached about 18 years) and lived only to their thirties, so nearly adult-sized Tyrannosauruses like Little Eatie should have outlived their parents.
• Because You Were Nice to Me: Big Eatie repays Darius for his past kindness by both leaving him alone when he was vulnerable and saving his life.
• Big Damn Heroes: After being heavily wounded by the Spinosaurus, Big Eatie recovers just in time to rescue Darius while Little Eatie devours Hawkes and helps her mother in chasing the Spinosaurus away.
• The Bus Came Back: In the official trailer for Chaos Theory the campers are seen encountering a Tyrannosaurus who looks exactly like Big Eatie, indicating that she and the other animals on Mantahcorp island will somehow be brought to the mainland.
• Chemically-Induced Insanity: Both are driven mad by drugs slipped to them by Kash, causing them to wildly lash out at each other.
• Covered in Scars: Both of them have scars riddled all over their faces and bodies.
• Disappeared Dad: It's unknown what happened to Little Eatie's father considering The Lost World established that both parents care for their young, presumably he is either dead or was left behind on Sorna.
• Extremely Protective Child: Little Eatie is both a loving and protective daughter to Big Eatie.
• Good Parents: Big Eatie might be a ferocious and territorial predator, but her affection for her daughter Little Eatie is very obvious and notable, with Big Eater doing anything she can to protect and provide for her child, even if she's an adult.
• Heroic Second Wind: After being wounded grievously by the Spinosaurus, Big Eatie recovers fast enough to re-engage the larger theropod and chase it off alongside her daughter.
• The Leader: Once the watering hole is established in the Forest Biome, Big Eatie is viewed as the alpha by the island's dinosaurs. If she's calm, they're calm, and vice versa.
• Made of Iron: While fossil evidence shows that T. rexes could suffer serious wounds and survive, these two take it to a ridiculous extent and suffer more harm than any other T. rex in the history of the franchise (not counting the video games).
• Mama Bear: Big Eatie is both a loving and protective mother to Little Eatie, and she is more than prepared to fight off a pack of mind-controlled dinosaurs to rescue her cornered daughter.
  • To a lesser degree she ends up becoming this towards Darius in season 5, not only leaving him be when he is vulnerable but also seemingly saving him from the Spinosaurus.
• Monster Is a Mommy: The kids are pretty shocked to encounter a Tyrannosaurus rex on this new island, even more so when they realise there are two, on top of that Mae reveals that they are actually parent and child.
• Mysterious Past: Aside from Mae telling the kids that Big Eatie and Little Eatie are a mother and daughter originally from Isla Sorna there is not much further information about them, how old they are, when they were taken from Sorna, what happened to Little Eatie's father, who he is and how many other Tyrannosauruses from Sorna are still alive.
• Mythology Gag: The original novel featured a pair of Tyrannosaurus, an adult and a juvenile, as one of the threats the heroes face. Here, another pair, this time explicitly mother and daughter, also menace the heroes for some time.
• Non-Malicious Monster: While Rexy was never malicious she was still the fearsome ruler of Nublar, there is a greater emphasis on making Big Eatie and Little Eatie sympathetic by making them a loving family. Season 5 goes out of its way to show them as (relatively) benevolent with Big Eatie responding to Darius' efforts to communicate to the point where she clearly makes a choice not to attack him. Once the watering hole is established, the pair are shown to be non-aggressive as long as they aren't hungry (and since the campers are keeping them fed that's not an issue) to the point where Big Eatie becomes the alpha of the Mantah Corp dinosaurs, with even Pierce deferring to her. While not "safe" in the way Bumpy and Pierce are (while playing they both have no problem chasing Darius and Brooklyn), they are by far the most approachable Tyrannosauruses in the franchise.
• Superior Successor: Big Eatie puts up a much better fight against the Spinosaurus than the Bull did, being able to fight it pretty evenly for an extended period and recovering from a near-fatal knockdown, going in for round two when Little Eatie arrives to help drive it off.
• Suspiciously Similar Substitutes: Big Eatie and Little (Big Eatie primarily) serve as the resident Tyrannosauruses on the island, taking over Rexy's role from Seasons 2 and 3.
• There Is Another: The existence of Big Eatie and Little Eatie confirms that Rexy is not yet the last of her kind. This is even more the case by the time of Dominion as both the Buck and Doe are confirmed to be alive and have formed a family unit with Rexy in the Biosyn valley, meaning that globally there are a total of five known surviving Tyrannosauruses, Three in Italy and two on Mantahcorp Island with Junior, Little Eaties Father and at least another two to four from Ingen’s original seven unaccounted for.
• Unknown Character: Little Eatie’s father, he is never seen or even mentioned and so his existence is only inferred because Little Eatie is Big Eatie’s daughter, meaning Big Eatie had to have a mated with a male sometime prior to being relocated to Mantahcorp Island since we have no indication that Tyrannosauruses, like the Scorpius rex and Blue in Jurassic World Dominion, have the ability to reproduce via Parthogenesis.
• Vague Age: Neither Big Eatie nor Little Eatie is given exact ages nor an indication of when they were each born (while a natural tyrannosaur their size would have to be at least 13 years old, the cloning process causes rapid maturity with Rexy reaching her larger adult size within 5 years). Little Eatie should still be quite young and the fact that Big Eatie is her mother means that she is at least a second or third generation Tyrannosaurus which would place her under 23 years old, but it's unknown if Big Eatie and Little Eaties father are from Ingen’s original seven Tyrannosauruses or if one or both are hatchlings from a later generation themselves. The former seems more unlikely for Big Eatie as she did not live a partially captive life or in an environment without direct competition as Rexy did.
• What Happened to the Mouse?: They disappear about halfway through the storyline of Season 4 (Little Eatie lying badly injured in the jungle and Big Eatie having been taken to the medbay after her fight with Pierce) and aren't mentioned again since. However, both of them return in Season 5 as eventual nominal allies of the campers.

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