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Characters / Jurassic Park Tyrannosaurus

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Jurassic 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 (Rexy), 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 to higher order primates, perhaps even great apes. 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 . 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. 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).
    • 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).
    • 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.
    • 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.
  • 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.
  • 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.

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.
  • 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.

Film Canon


Rexy (Tyrannosaurus rex)

Appearances: Jurassic Park | Jurassic World | The Evolution Of Claire | Jurassic World: Fallen Kingdom | Jurassic World: Camp Cretaceous | Jurassic World Dominion
She's big, she's mean, she likes eating lawyers, dinosaurs, and hybrids — ladies and gentlemen, we still have a T. rex!

Aggression Index: High
Park Attraction: T. Rex Kingdom
Diet: Carnivore

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

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.

For more on Rexy, see her character page here.

    The T. rex Family 

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

Appearances: The Lost World: Jurassic Park | Jurassic World Dominion
"Mommy's very angry..."

"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.

  • 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.
  • 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.
  • 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.
  • Kick the Son of a Bitch: The Doe squashes Carter under her foot and the Buck uses his jaws to break Peter Ludlow's leg so that Junior can make his first kill.
  • 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.
  • 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.
  • 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. The baby's fate, however, is still uncertain.

    "Bull" Tyrannosaurus 

Tyrannosaurus rex ("Bull")

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.

  • 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, 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.
  • 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.

  • 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 groupnote , 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.
  • 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.
  • 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.
  • Kick the Son of a Bitch: Big Eatie is the one who stomps on Mr. Gold and Little Eatie is the one who munches down on Hawkes.
  • 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.
  • 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 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.
  • Vague Age: Neither Big Eatie nor Little Eatie is given exact ages (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 but it's unknown if Big Eatie is one of the original seven Tyrannosauruses or a hatchling from a later generation. The former seems more unlikely 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.