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There are a variety of dragon species throughout the islands, ranging from small and mostly harmless to large and lethal, everywhere in between, and mixing all of that.

For individual dragons, see the entries where they come from.

  • All Animals Are Domesticated: Averted. While Berk's dragons eventually settle in (though not always the most well behaved), other dragons are still dangerous and often hostile, at least under certain circumstances.
  • All There in the Manual: The Book of Dragons and Bork's Papers are in-universe manuals. In one of the shorts, "The Book of Dragons", we learn about several more dragons. Some have appeared in the show proper, others, like the Snaptrapper and Timberjack, haven't.
  • Asskicking Equals Authority: They seemed to follow this rule in general. One is not born into the Alpha status but has to earn it through power. Once a dragon becomes the Alpha, it can control other dragons through sheer force of will.
  • Breath Weapon: Almost all dragon species have them, and most commonly they breathe fire, which is created by expelling a flammable gas and then igniting it with sparks from a mechanism in the mouth/throat. The Stoker Class, in particular, are well-known for their firepower and high shot limit for their fire attacks. Certain species have more unique weapons, though.
    • Hideous Zipplebacks exaggerate the gas to spark by having different parts in different heads. This means they technically breathe explosions, as their standard tactic is to exhale a cloud of gas and let it settle before igniting it in a single sharp burst. They can envelop prey in their gas and use it as a poisonous Knockout Gas instead of just blowing it up.
    • Gronckles and Hotburples eat rocks and metals, heat them to melting point in their stomachs, and then vomit them up as globs of lava.
    • Eruptodons consume lava and regurgitate it.
    • Scauldrons spray superheated water to flash-boil prey.
    • Changewings spit corrosive slime.
    • Thunderdrums use sonic blasts that can pulverize stone.
    • Night Furies shoot blasts of concentrated plasma, which explode when it hits a target.
    • Flightmares spit a paralytic toxin that takes effect in seconds and can be absorbed through the skin.
    • Skrills can launch bolts of lightning that can even hit multiple targets. They do this by absorbing ambient electricity from the clouds and exhaling specialized ionizing gas to give the projected lightning a route to follow.
    • Bewilderbeasts swallow tons of seawater before regurgitating it as ice, and use that ability to make glacier nests.
    • The Red Death exhales what looks like pyroclastic clouds— that is, cloud-like formations of super-heated cinders and gas.
    • Snow Wraiths and Windgnashers spit rapid-fire frost.
    • Death Songs spew amber, which hardens when it cools, to cocoon and immobilize prey.
    • In addition to their Vacuum Mouth, Submarippers weaponize the indigestible materials they swallow, coughing up the debris of rock formations and shipwrecks in the direction of their enemies.
    • Slitherwings spit and excrete deadly venom that is debilitating in moments and lethal within a day.
    • Sandbusters fire globs of superheated sand that hardens into glass.
    • Grim Gnashers fire volleys of their own TEETH.
    • Snifflehunches SNEEZE fire.
    • Hobblegrunts breathe ethane and set it alight.
    • Windstrikers fire super-heated air.
    • Typhoomerangs and Stormcutters breathe their fire in flaming cones.
    • Smothering Smokebreaths produce obscuring clouds of smoke to hide their movements.
    • Sentinels utilize a weaker version of the Thunderdrum's sonic blast, coupled with extremely powerful gusts of wind from the beating of their wings.
    • Shellfires launch molten boulders that explode like cannonballs and can hit a target from over a mile away.
  • Early-Bird Cameo: A lot of times, dragons that are shown or mentioned in the book pop up later in shorts of the television series itself.
  • Elite Mook: Most dragon species have a known variant called a Titan Wing, which are larger, more colorful, and more aggressive members of whatever species it is.
  • Flying Seafood Special: Most of the dragons, even the most flying specialized, are still very capable swimmers, and vice-versa. Many even use their wings as paddles, not unlike several seabirds. Must come in handy when fish is a major part of many species' diet.
  • It Can Think: Intelligence varies between species and individual dragons, but the protagonists learn that dragons are capable of problem-solving and will recognize previously used traps. Most show some signs of intelligent reactions, while others are smart enough to hold crude conversations with and operate simple machinery. Special mention to the Strike Class, as they're regarded to be the more intelligent species of their kind.
  • More Teeth than the Osmond Family: Generally, the bigger the head the more teeth it has. The current kings, however, are the Whispering Death (which has six rows of teeth that can rotate like a rock-cutter) and the Snaptrapper (which has four heads, each of which has three toothy jaws).
  • Our Dragons Are Different: As seen in the rest of this page, dragons have many different species, and come in all shapes and sizes.
  • Predators Are Mean: There's a certain invocation of this. Canonically, all of the "friendly" species of dragons are piscivores (fish-eaters) and have no interest in animal flesh (except Stormfly, who will eat fish if offered but treats chicken as her Trademark Favorite Food). Those few that explicitly or implicitly do eat non-fish meat, however, have been villains — first the Whispering Death (although that is later shown not to be so bad), and then the Flightmare, who explicitly eats humans to boot, and then the Skrill, who chooses to go after sheep rather than fish upon being set free. By contrast, the Buffalord, which is a herbivore, is incredibly docile, to the point of barely caring that there humans around it until they try to take it away from the island it lives in.
  • Unreliable Narrator: Several facts about the book are shown to be wrong, including that the Scauldron DOES have venom ("Dragon Flower"), and in regards to some dragon types it knows nothing (case in point: Night Furies).

Strike Class

    Night Fury
Introduced: the How to Train Your Dragon movie.
Dragon Class: Strike

The Unholy Offspring of Lightning and Death itself, Night Furies are fast, stealthy, and hit with enough firepower to blow the tops of catapult towers into cinders. They are the most feared dragons amongst the ranks of the Vikings. They belong to the Strike Class of dragons, emphasizing the classification's hard-hitting firepower and speed. They have a closely related subspecies with white coloration known as Light Furies.

  • Always Accurate Attack: Their plasma blasts were described by Hiccup in the movie to "never miss", which was backed up in that almost all of their attacks (in the film) hit their mark. The fact that Toothless sometimes missed during the show is explained by the fact that the Night Fury is a night fighter and before the first film, always appears at night and picking off stationary objects like catapults.
  • The Dreaded: Vikings will gladly fight any of the other dragons, even ones that can swallow them whole, and have a long and impressive list of kills. If this one's screech is even heard? They run for cover screaming "NIGHT FURY! GET DOWN!". So much so that it was the only dragon listed where Vikings are advised to not even attempt to fight it.
  • Endangered Species: Implied—they're extremely rare compared to other species of dragons, to the point of where up until Toothless came along, virtually no one had ever actually seen one (there wasn't even a drawing of it in the Dragon Manual that Hiccup was studying during his dragon training). In the second film, Eret admits that he thought Night Furies were "gone for good" and Valka (Hiccup's mother) notes that Toothless very well could be the last of his kind. The exact reason for the species' absence is never fully specified.
    • Grimmel the Grisly, the main antagonist of the third/final film, is revealed to have been the main person who Night Furies into endangerment, claiming to have hunted every Night Fury except for Toothless—while there very well could be other Night Furies out there (outside of the Archipelago), Toothless is the only Night Fury ever actually seen in the (living) flesh.
  • Expy: Fans of Monster Hunter notice a similarity between a Night Fury and a Nargacuga, and perhaps now, the Gore Magala.
  • Hero Killer: For the Vikings. That's why they are The Dreaded to them.
  • Informed Flaw: In the tie-in ads and Defenders of Berk, it is mentioned that Night Furies only have six shots, similar to Gronckles. Toothless regularly fires dozens of shots in a fight.
  • Lightning Bruiser: They're called the unholy offspring of lightning and death, after all. As a Strike Class dragon (and the first one to be revealed, after all), they're incredibly fast, pack large amounts of firepower, and can take a fair bit of punishment as well.
  • Mysterious Animal Senses: "We Are a Family" reveals that they can use echolocation.
  • Metal Slime: Toothless is the only known Night Fury encountered so far, indicating either Last of Its Kind or their extreme rarity.
  • Names to Run Away from Really Fast: Both its name and the Red Baron-status invoke this in the Vikings.
  • Nocturnal Mooks: Their coloring and fighting approach indicate that this is invoked.
  • Nothing Is Scarier: To an extreme extent—not a whole lot is really known about Night Furies, other than the fact that they're (typically/mostly) nocturnal and are considered dangerous to the point of being The Dreaded.
  • The Quiet One: They are silent compared to most other dragons. Combined this with their firepower, speed, and camouflage, they are downright nightmarish at night. This one of the reasons the Vikings are downright scared of these dragons in particular because you won't hear or know their presence until the start of their attack run.
  • Red Baron: "The unholy offspring of lightning and death". In fact, the Night Fury is the only dragon in the movie to get a Red Baron-like title.
  • Shock and Awe: Interesting that their dragon fire seems to give off this more than Playing with Fire. Also, if the battle with the Red Death in the movie is to go by, they have a concentrated blast so powerful they can topple the most gargantuan of dragons. The third movie shows that Toothless has the ability to summon lightning to strike himself, dealing cataclysmic damage to nearby foes and temporarily cloaking himself.
  • Super Senses: They can echo-locate much as bats and some birds can, enabling them to maneuver in complete darkness and helping explain their accuracy when attacking at night.
  • Stuff Blowing Up: One of the reasons why they are feared. Their Breath Weapon attack is powerful enough to destroy catapults with ease and knock gigantic dragons down. As well as the fact that it can One-Hit Kill Vikings. Compare that to the fact that the other dragon's attacks seem to have a degree of survivability hammers home the fact that Night Furies are extremely dangerous to combat.
  • Super Strength: Surprisingly strong for its size—while it's obviously not the largest dragon species out there, Night Furies can wrestle the likes of a Monstrous Nightmare or a Whispering Death into submission. They can also carry very heavy items, such as boulders or adult Vikings in flight for short periods of time.
  • Super Speed: One of the fastest breeds of dragons, so much so that nobody had ever seen what one looked before Hiccup injured Toothless. Only the Red Death is known to have matched or exceeded its speed, and Stormfly (a Nadder) only gets close because of Astrid's training and care.
    • In Fishlegs' Dragon Stats on the How To Train Your Dragon 2 DVD, he states that Night Furies can fly faster than the speed of sound. Hiccup and Toothless are seen doing this in the Dragons: Riders of Berk opening.
  • Wave-Motion Gun: Their plasma blasts can do serious damage, toppling things like the Red Death or sinking ships in one hit. In the 2nd movie, it gives Drago's Alpha pause each time it hits, interrupting its attempts to fire its ice breath weapon and eventually even breaks off its left tusk.
  • You Are Already Dead: The Book of Dragons mentions that if you encounter one, you are already screwed.

Introduced: "View To A Skrill Part 1"
Dragon Class: Strike

An elusive member of the Strike Class of dragons, the Skrill are known for their unique electrical abilities.

  • Achilles' Heel: It cannot use its electricity when submerged underwater.
  • Arch-Enemy: With Singetails.
  • Ax-Crazy: According to the Book of Dragons, the Skrill is "Untrainable". Hiccup was willing to try, but he ultimately settled for just taking it out of the picture. Later on, however, the same individual proved capable of gratitude toward humans, though it remains to be seen if it's possible to train one. Viggo then shows that it is possible to tame one using metal objects.
  • Early-Bird Cameo: Its first "appearance" is as a drawing in the Dragon Manual in the film (Hiccup even mentions its name). It isn't properly introduced until the show.
  • Harmless Freezing: Can survive decades frozen solid in a block of ice. Justified due to its efficient internal body temperature.
  • It Can Think: It's a smart dragon, no doubt on that. When the riders were going to trick it into getting into the glacier through a small opening to freeze it again, it certainly knew better than to fall for it and sealed it.
  • Lightning Bruiser: Being an electric Strike Class dragon, it is one of the few species that can match a Night Fury in speed and destructive power.
  • Lightning Gun: Its breath weapon. The Skrill breathes out concentrated beams of powerful electricity. This means its attacks have limited homing ability towards metal and it can electrocute water to create a lethal surge.
  • No-Sell: Its electrical field can block Toothless' plasma blasts, though it needs to recharge to keep it up. According to Viggo this ability also makes it immune to all the Singetail's fire attacks and gives it an inherent advantage against them, which is why it's the Singetail's only predator.
  • Purple Is Powerful: One of two dragons that utilize an electrical/plasma Breath Weapon (the other being a Night Fury) and it's colored violet.
  • Ride the Lightning: It can call down a lightning strike and use it to get in the air in the blink of an eye.
  • Shock and Awe: Thanks to unique organs and metallic scales, the Skrill can absorb electrical energy from the clouds and channel it through its body. It can erect a field of static electricity to ward off attacks or project it as a blast from its mouth.
  • Shoot the Bullet: Can nullify other dragons' attacks this way using its own Breath Weapon.
  • Spikes of Villainy: Is covered in spines. According to the series wiki, they're laced with metal and used to absorb lightning from the clouds.

    Snow Wraith
Introduced: "Dragon Eye of the Beholder Part II"
Dragon Class: Strike

An erratic Strike Class dragon that lives in glaciers.

  • An Ice Person: To the point of hibernating during the summer.
  • The Dreaded: After an ill-fated voyage that killed two Vikings, Gothi is hesitant to go back and find it.
  • Fast Tunnelling: It can dig through ice and snow pretty quickly.
  • Lightning Bruiser: Like all the other dragons of its class, it packs both the speed and power to take down virtually any opponent - especially if it's in a blizzard, where it can use its stealth to further boost its fighting prowess.
  • Magic Missile Storm: It's not really magic, but its Breath Weapon fires frost in rapid succession.
  • Night-Vision Goggles: Sort of; its eyes see differences in temperature instead of actual color vision, allowing it to see in a blizzard.
  • Stealth Expert: Fighting it on its home turf is a terrible idea since its white scales let it blend into the surrounding snow.

    Triple Stryke
Introduced: "Stryke Out"
Dragon Class: Strike

An extremely dangerous Strike Class dragon that specializes in melee combat.

  • Animal Motifs: The tails and claws are strongly reminiscent of a scorpion, while the coloration seems more like a wasp.
  • Arrogant Kung-Fu Guy: They're described as being very vain and overconfident due to their incredible power, which is a weakness that can be exploited.
  • The Berserker: Its fighting style seems simply based around attacking as fast and as often as possible, with little regard given to defense. This is what gets Sleuther chosen as a ride dragon by Dagur, who shares its Blood Knight and all-out attacking tendencies.
  • Beware My Stinger Tail: Three tails that end in scorpion stingers. It can braid them together to act as a single tail.
  • Blood Knight: They're described as being incredibly violent and battle-hungry even from birth.
  • Bright Is Not Good: It has a bright yellow and black color scheme and has an incredibly violent disposition.
  • Lightning Bruiser: It's a Strike Class dragon, after all. The Triple Stryke is very fast, exceptionally durable, and has incredible strength in its physical strikes - although, in contrast to the other Strike Class dragons, it specializes in close-range combat rather than ranged attacks.
  • Multiple-Tailed Beast: Three scorpion-like tails, which can strike individually, or all at once.
  • Poisonous Person: Each one of its three tails holds a different type of venom. One numbs the target, one disorients them with hallucinations, and one induces agonizing pain.
  • Power Pincers: Notably has large pincers instead of conventional claws.
  • Prehensile Tail: Sleuther was able to throw Toothless around with just one of his tails.
  • Scary Scorpions: Its body shape resembles that of a scorpion, and it's a very powerful dragon.
  • World's Strongest Man: Downplayed. In the fighting arena that Ryker put Sleuther in, it won all its battles so efficiently that people were beginning to get bored of them. It quickly learned a lesson in humility after Toothless soundly defeated it.

    Light Fury 
Dragon Class: Strike

A Strike Class dragon, an elusive subspecies to the Night Fury that has the ability to cloak itself with its Breath Weapon.

  • Chameleon Camouflage: The Light Furies' ability to disappear is caused by flying through their fireballs, which heats their scales and enables them to become reflective of their surroundings.
  • Pale Females, Dark Males: Averted, at first it seems that the Light Furies are the female equivalent of the Night Fury in a case of Bizarre Sexual Dimorphism, but they're a subspecies instead, with males of similar coloration to the females.

Introduced: How to Train Your Dragon: The Hidden World
Dragon Class: Strike

A fearsome Strike Class dragon that travels in packs and preys on other dragons. They possess tusks, pincers, and a clubbed tail with a venomous stinger on its end.

  • Beware My Stinger Tail: The tail of the Deathgripper is tipped with a stinger filled with venom that can sedate other dragons.
  • Brainwashed and Crazy: Their venom is capable of making dragons susceptible to commands.
  • Hoist by His Own Petard: Grimmel uses their own venom to control a small pack of Deathgrippers.
  • Hollywood Acid: Deathgrippers spit highly flammable acid.
  • I'm a Humanitarian: They prey on other dragons and DeBlois refers to them as "vicious dragon killers".
  • Power Pincers: They have pincers on their forelegs, similar to that of a mantis.
  • Red and Black and Evil All Over: These dragons have black scales on their upper bodies and red scales with black stripes on their underbellies. They are also used by the villainous dragon hunter Grimmel to help him on his hunting expeditions. Dean Deblois says they were partially based on black widow spiders.
  • Scary Scorpions: They are venomous, scorpion-like dragons that prey on other species.
  • Scary Teeth: They have very long, retractable tusks.
  • Slave Mooks: Grimmel forces them to act as his personal dragon killers using head collars that inject their venom into their wearers.
  • Super Strength: On paper, Deathgrippers are considerably stronger than your average dragon. The official dragon statistics show that their "attack" stat is third-highest at 27.note  Additionally, their jaw strength is listed at 16, whereas most dragons' jaw strength is in the single digits.


Stoker Class

    Monstrous Nightmare
Introduced: the How to Train Your Dragon movie.
Dragon Class: Stoker

The iconic Stoker Class dragon, Monstrous Nightmares are the largest of the common dragons and well-known for their violent streak and their copious firepower.

  • Blood Knight: It was said in the DVD commentary that even though all the dragons will fight, the Monstrous Nightmare fights simply for the joy of fighting.
  • Expy: A Monster Hunter fan with a keen eye might notice several similarities with this dragon and the ferocious King of the Skies, Rathalos.
  • Defeat Means Friendship: In the TV series, at least, this seems to be the most effective method to earn their friendship. In the film, Hiccup can tame one with far less effort.
  • Incendiary Exponent: Monstrous Nightmares attack after setting themselves on fire.
  • Names to Run Away from Really Fast: Most dragons have these, but theirs is a particularly extreme example.
  • Super Spit: All There in the Manual sources state it coats itself with flammable spit, which is how it lights itself on fire. In a moment of brilliance, Snotlout (who rides a Nightmare) comes up with the idea of harvesting this spit (as "Monstrous Nightmare Gel") to use as tinder, an idea Hiccup later expands on.
  • Wreathed in Flames: Once on fire.

    Terrible Terror
Introduced: the How to Train Your Dragon movie.
Dragon Class: Stoker

Terrible Terrors may be small, but they are no less dangerous than their larger kin amongst the dragons.

  • Instant Messenger Pigeon: Hiccup and Fishlegs turn them into this in "Appetite for Destruction".
  • Killer Rabbit: They are about the size of a medium-sized cat. That won't stop them from attacking larger foes. The fact that, according to the Book of Dragons short, they're social dragons who tend to hang out in dozens-strong packs, makes them even more dangerous.
  • Mythology Gag: They look just like the book's version of Toothless.
  • Pintsized Powerhouse: Like all dragons, it is stronger than its size implies.
  • Ridiculously Cute Critter: Especially when one sleeps next to Hiccup because he gave the dragon a fish.
  • Team Pet: Due to its size, there's no one small enough to ride one. That doesn't mean they aren't liked all the same. "Worst in Show" has the riders each adopting one in a competition to see who the best trainer is. No one wins since they get distracted by an attack from Alvin.
    • Hiccup and Fishlegs have plans to use them as carrier pigeons to deliver messages to Berk from far away, calling it "Air Mail".
  • Zerg Rush: While vicious on its own, a single Terrible Terror is not too much of a threat. But they are social creatures and tend to work in packs.

    Red Death 
Introduced: the How to Train Your Dragon movie.
Dragon Class: Stoker

See the Other Dragons

Introduced: "The Terrible Twos" First appearance of a dragon not from the movie.
Dragon Class: Stoker

Typhoomerangs have a unique ability during flight: they rotate (by analogy with the typhoon/ boomerang) at high speeds, zooming through the air. Though, as they rotate, they seem to pop off the objects around them, making them extremely dangerous. The ash from their fire breath leaves a distinctive burn on the ground. The ash apparently acts as a fertilizer; flowers will grow in the burn mark afterward.

  • Everything's Better with Spinning: Its main way of breathing fire.
  • No-Sell: Can eat eels that are poisonous to all other dragons.
  • Power-Up Food: As stated above, unlike most dragons, Typhoomerangs can eat eels, which is something their Breath Weapon is dependent on. If a Typhoomerang runs out of fire breath, it can just eat some eels to regain it.
  • Ring of Fire: They hunt by surrounding their prey with fire. The flames they exhale are also tornado-shaped, meaning an agile enough dragon can fly through the center without touching them.
  • Seldom-Seen Species: A small number of them reside in the forests outside Berk but despite this, no one had ever seen one before the series (And they have only appeared in two episodes so far). Their home island is revealed in "The Eel Effect": they are native to Eel Island as they can eat eels without getting horrifically sick (in fact, they use it as fuel for their Breath Weapon).
  • Super Speed: It can get a speed boost by igniting itself like a Catherine Wheel firework.
  • Wreathed in Flames: As noted, this is the catalyst for its Super Speed. Not only does this make it fly faster, but it also turns it into an airborne, spinning saw blade.

Introduced: "Portrait of Hiccup as a Buff Man".
Dragon Class: Stoker

Small Stoker Class dragons, Fireworms are lizard-sized and lizard-like dragons that rely on their fiery skin to shield them from bigger enemies. They swarm in large numbers. Their Queen, however, is massive and can breathe fire like regular dragons.

  • Breath Weapon: The little ones don't seem to have it, but the Queen does.
  • Incendiary Exponent: Said to burn with the heat of the sun.
  • Large and in Charge: The Fireworm Queen is larger than most regular dragons, about halfway between the Monstrous Nightmare and the Screaming Death.
  • Mama Bear: Do not mess with the Queen's nest if you want to live.
  • Prehensile Tail: The Queen was able to pick up Hookfang with her tail.
  • Vertebrate with Extra Limbs: They have five pairs of legs. Along with their wings, that makes twelve limbs.

    Night Terror
Introduced: "When Darkness Falls"
Dragon Class: Stoker

A species of dragon found by Hiccup's group, similar to Terrible Terrors but slightly larger. They make up for their lack of size by flying in formations to make themselves look like one very large dragon. There are two notable subspecies: a white-colored, subterranean variant that is sensitive to light, and a red-colored, volcanic variant that lives on Defenders of the Wing island.

  • Animal Espionage: After Hiccup's group help them out, the Night Terrors essentially volunteer to be sentries for the Edge.
  • Awesomeness by Analysis: The entire pack can perfectly imitate a new shape simply by observing it for a few moments. So far they've used this ability to pay homage to Toothless in one episode, then they use this ability to impersonate the Fireworm Queen in a later episode to draw the Fireworms away from their island.
  • Feed It with Fire: An ability that the volcanic subspecies have demonstrated.
  • Red Eyes, Take Warning: The volcanic Night Terrors have glowing red eyes, though subverted as they're not malevolent.
  • Synchronized Swarming: As long as the alpha is there to guide them, they can swarm to form a larger approximation of themselves or mimic other dragons.
  • Weaksauce Weakness: Without the alpha, they cannot swarm and become vulnerable to predators.

Introduced: "Turn and Burn"
Dragon Class: Stoker

A large Stoker Class dragon that launches fireballs from its tail as well as its mouth and can even jet fire from its underside. Their combat abilities are among the most versatile of any dragon and due to this, they become the mounts the Dragon Flyer Krogan specifically seeks to use.

  • Arch-Enemy: With Skrill. According to Viggo, it is the only dragon species they have a disadvantage against as its electric field can neutralize all their fire attacks.
  • Abnormal Limb Rotation Range: Its eyes are exactly like a chameleon's, being able to move independently of each other and point behind it. This makes them difficult to surprise or sneak up on
  • Acrophobic Bird: One of their few weaknesses is that they avoid flying too high up into the air. If forced to fly beyond a certain altitude they become disoriented and may outright crash land.
  • Distress Call: Lights signal fires to call for backup.
  • Giant Mook: Krogan rides one several times the size of the others.
  • Playing with Fire: Can breathe fire, fling fireballs from its tail, and vent fire from its underbelly.
  • Recoil Boost: The flame vents on its underbelly can be used to give it a short boost of speed.
  • Spread Shot: Can fling up to four fireballs from its tail at once.
  • Vertebrate with Extra Limbs: Eight limbs this time; four legs and four wings.

    Shadow Wing
Introduced: "The Longest Day"
Dragon Class: Stoker

The aircraft bomber of dragons, the Shadow Wing is never on its own. The smaller dragons are seen first, herding prey into the jaws of one big dragon that hides the rest of the pack in the shadows of its wings.

  • Fireballs: The Shadow Wings' shots can bounce several times before exploding.
  • Mighty Glacier: The big one is this, it makes up for its lack of speed by having the little ones cling onto its wings and unleash More Dakka.
  • Wounded Gazelle Gambit: How they hunt, one of them pretends to be injured to lure in potential prey looking for a meal (or any human wanting to investigate) before the rest of the pack ambushes them.
  • Zerg Rush: The smaller Shadows make up for their lack of presence by grouping up and attacking from all directions.
Introduced: How to Train Your Dragon 2
Dragon Class: Stoker

A frilled Stoker Class dragon that changes color based on mood.

  • Chameleon Camouflage: Played straight with real-world chameleons in that the color changes of the Hobblegrunt are based on mood, as opposed to the camouflage of the Changewing that is based more on Hollywood Chameleons.
  • Colour-Coded Emotions: The color of their scales change to reflect their current mood.
  • Emotion Bomb: Their color changes can also alter the mood of other dragons around them, allowing them to pacify perturbed dragons.
  • The Empath: Their frill allows them to detect the moods of surrounding dragons, as well as changes in temperature or barometric pressure. This allows Gruff, the blinded Hobblegrunt in Valka's care, to navigate its surroundings normally.
  • Hate Plague: They can also use their mood-altering abilities to rouse fellow dragons in their nest into aggression for defensive purposes.
  • Red Is Violent: Apparently, if the Hobblegrunt turns red, you're in for quite the beatdown.

Introduced: How to Train Your Dragon 2
Dragon Class: Stoker

A Stoker Class dragon that secretes poison through its skin.

  • Acquired Poison Immunity: Averted, the Threadtail is allergic to its own poison to a lesser degree than other species, causing it to suffer only from extreme itchiness whenever it utilizes its own defense mechanism.
  • Poisonous Person: Like the Slitherwings, Threadtails secret poison through their skin, but only when defending themselves, as excreting it constantly, due to their aforementioned allergy, would likely be unending torment.
  • Weaksauce Weakness: Are, again, allergic to their OWN poison.

Boulder Class

Introduced: the How to Train Your Dragon movie.
Dragon Class: Boulder

The iconic Boulder Class dragon, Gronckles are relatively small and sluggish dragons, but extremely tough and strong.

  • Dumb Muscle: Gronckles are generally lazy and easygoing, but rouse them, and they're as temperamental and direct as an angry rhino.
  • Extreme Omnivore: It can eat rocks. And its Breath Weapon depends on this fact.
  • Limit Break: In the movie, it is stated they only have enough fuel for six shots. Meatlug and other Gronckles can be seen firing more shots during the series.
  • Magma Man: The Gronckle is one of the few dragons that doesn't directly produce fire. Instead, it gobbles up rocks and mouthfuls of soil and then heats them to a molten state inside its belly. This superheated rock is then spat out at targets as distinctive fireballs. With the right combination of rocks, it can also produce Gronckle iron, a lightweight metal that is tougher than period iron and excellent for weapon and armor crafting. Though whether it's a real material under a different name or not is unspecified.
  • Mighty Glacier: The slowest of the rider-sized dragons, but its magma attack is pretty powerful. It can even stagger a Screaming Death simply by ramming into it and keeps coming back for more!
  • Mix-and-Match Critters: The Gronckle looks like a cross between a bulldog, a bumblebee, and a toad.
  • Mundane Utility: Amongst the dragons, Gronckles have the most of this. They can hover in place, they can ingest rocks to make materials (for example, with sandstone they can make glass), and can carry significant loads while flying.
  • No-Sell: Immune to Dragon Root (an herb that causes all other dragons to go crazy).

    Whispering Death
Introduced: "What Flies Beneath".
Dragon Class: Boulder

A rare and deadly member of the Boulder Class, the Whispering Death is a subterranean species of dragon that uses its wide mouth, spike-covered sinuous body, and six rows of rotating teeth to bore through the ground and come up from below when pursuing prey.

  • Blank White Eyes: Though it isn't blind.
  • Dark Is Evil: One of the scariest looking dragons has also been one of the nastiest, with the first one harassing the entire village of Berk, including eating livestock, out of a feud with Toothless and the second one ending up being used by Alvin the Treacherous. This perception changes later in the series when it's shown that they're not all bad after all.
  • Early-Bird Cameo: First mentioned in the Dragon Manual in the first film, but didn't make an actual appearance until Riders of Berk.
  • Everything's Better with Spinning: They have rotating jaws and their tails move in a circular motion while in flight.
  • Flying Seafood Special: Thematically invoked; despite being a mostly subterranean creature, the Whispering Death is still quite capable of flight.
  • Lean and Mean: They're the archetypal 'villain' dragons, with long, limbless, eel-like bodies.
  • More Teeth than the Osmond Family: Six rows of rotating teeth. Between this, their oversized, ball-like heads, and their hostility, they're a draconic Langolier.
  • No-Sell: Unaffected by Dragon Nip (an herb that has a calming effect on all other dragons), just in case they weren't hard enough to deal with.
  • Ring of Fire: It breathes concentric rings of fire, with a normal fireball running through them.
  • Spikes of Villainy: One of the archetypical "evil" dragons and the one with the most spines per surface area.
  • Spike Shooter: Like the Deadly Nadder, only from virtually every point on its body.
  • Tunnel King: This is its signature ability and mode of travel.
  • Weakened by the Light: They retreat from direct sunlight, though even mild cloud cover is sufficient for them to go outside.

    Screaming Death 
Introduced: "Tunnel Vision"
Dragon Class: Boulder

See the Other Dragons.

    Catastrophic Quaken
Introduced: "Quake Rattle and Roll"
Dragon Class: Boulder

A large Boulder Class dragon that can curl and roll its body like a giant ball.

  • Gentle Giant: Befriend the Quaken, and it becomes this.
  • The Juggernaut: When it's rolling, it can't be stopped. The only thing to do is get out of the way.
  • Mighty Glacier: It can tank direct hits from Toothless' plasma blast without slowing down.
  • More Teeth than the Osmond Family: A Quaken has two lower jaws, splitting down the middle. Both parts have their own set of boulder crushing teeth.
  • No-Sell: Marble can withstand attacks from all other dragons except this one.
  • Rolling Attack: How it moves through its tunnels, also likely squishing anyone unfortunate to be in them.
  • Shockwave Stomp: It can smash into the ground hard enough to rattle opponents in the air.
  • Spikes of Villainy: Quakens have spikes on every square foot of their topside. Subverted when it turns out to not be villainous.

Introduced: How to Train Your Dragon 2
Dragon Class: Boulder

A lazier, fussier member of the Gronckle's family tree.

  • Beware the Nice Ones: The easiest way to motivate a Hotburple is to make it angry. If it was casually destructive before, it'll prove that intentional destructiveness is so much worse.
  • Exhausted Eye Bags: They all have this look at all times. Combined with their mouth, it makes for a weirdly cheerful sleepy expression.
  • Extreme Omnivore: If it's not sleeping, a Hotburple is most likely going to be chowing down on rocks and metal.
  • Lazy Bum: Laziness is this species' hat, and if Grump is any indication, they'll even fall asleep while flying. And then they'll continue flying because they've adapted to doing so while asleep.
  • Magma Man: Much like their Gronckle cousins, Hotburples eat rocks for minerals and to fuel their Breath Weapon. What sets them apart is that they'll also eat metal, and actually prefer to do so.
  • Mundane Utility: Anything a Gronckle can do, a Hotburple can also do, be it hover in place or forging materials. They're just harder to motivate into doing so.
  • No-Sell: All those dragon-proof metals developed by the dragon hunters are just another meal to a Hotburple. Now, if only they were properly motivated...

Introduced: "Defenders of the Wing Part 2"
Dragon Class: Boulder

A huge Boulder Class dragon that lives in volcanoes, feeding off of the lava flow.

  • Bruiser with a Soft Center: When it is not fighting for self-preservation, it is actually quite docile.
  • Gentle Giant: It protects anyone friendly to it, as the Defenders of the Wing have proven.
  • Horror Hunger: What it eats (rocks and lava) isn't horrifying, but the fact that it can fall into a feeding frenzy that ends in an exploding volcano is.
  • Lava Adds Awesome: Not only does it eat lava continuously, but its skin looks like cooling lava.

Introduced: "A Matter of Perspective"
Dragon Class: Boulder

Gargoyle-like dragons that pretend to be statues. Entirely blind, they stand guard over the final dragon resting place of Vanaheim.

  • Blow You Away: Their Breath Weapon consists of a powerful blast of air that can force a flying dragon down or redirect projectiles back at them.
  • It Only Works Once: They adapt to the strategies and abilities of any dragon that comes to Vanahiem and new tactics won't work a second time.
  • Handicapped Badass: They are completely blind but serve as both caretakers and guardians for Vanahiem.
  • Our Gargoyles Rock: Their general appearance is gargoyle-like and they even sleep in a way that makes them resemble statues.
  • Nobody Here but Us Statues: They sleep standing up and completely still which due to their stony skin are easily mistaken for carved statues.

Introduced: How to Train Your Dragon 2
Dragon Class: Boulder

An intelligent and hard-working Boulder Class dragon that uses its own head as a tool.

  • Mundane Utility: Following the events of the second movie, the Shovelhelms that have relocated to Berk are being used for digging and hammering.
  • The Reliable One: Diligently work at tasks set to them and are known to seek out others in need of assistance, be they Vikings or other dragons.
  • Use Your Head: Shovelhelms, as the name implies, use their pointed chins to dig out holes for dragon nests or their Viking companions. Their armored heads are also used as hammers.

Introduced: How to Train Your Dragon 2
Dragon Class: Boulder

A playful and sturdy Boulder Class dragon that feeds on geodes.

  • Beware My Stinger Tail: Has the trademark tail bludgeon of its Gronckle and Hotburple cousins, but the spikes dotting it are longer and sharper.
  • My Species Doth Protest Too Much: Extremely nimble and active, a rarity among the normally slow and lazy Boulder Class dragons.
  • Trademark Favorite Food: Geodes, which it crushes with its very sharp teeth.
  • Weaksauce Weakness: Their diet of geodes restricts them to certain habitats, making them VERY easy to locate for dragon hunters, as well as very easy to bait into traps. Valka's Snafflefang in the second film, Lump, lost its leg in this manner.
    Crimson Goregutter 
Introduced: How to Train Your Dragon: The Hidden World
Dragon Class: Boulder

An enormous Boulder Class dragon with moose-like antlers.
  • Beware the Nice Ones: Crimson Goregutters are generally docile until they are provoked.
  • Gentle Giant: One of these massive dragons grows fond of the baby Gronckle Fishmeat.
  • Horn Attack: They spew lava onto their antlers, setting them ablaze before charging.
  • The Marvelous Deer: It's a huge dragon with moose-like antlers.

Tracker Class

    Deadly Nadder
Introduced: the How to Train Your Dragon movie.
Dragon Class: Tracker, formerly Sharp

The Deadly Nadder was originally the iconic Sharp Class dragon, a category of dragons distinguished by their natural arsenal of spines. However, after the events of Gift of the Night Fury and the discovery of the Tracker Class, they were categorized into this new class which is distinguished by sharp senses with Nadders being noted to be able to detect spies from upwards of a hundred meters away. Amongst the most avian-looking dragons, these vainglorious dragons spend much of their time preening themselves.

  • Attack Its Weak Point: The primary weak point of the Deadly Nadder is the blind spot in front of its head. To correct for this, it will attack anything that even gently touches the nose or hears something it cannot see. As Gobber said, "Blind spot, yes. Deaf spot ... not so much." That said, trainers who build up a strong rapport with their Nadders are allowed to touch them there.
  • Dinosaurs Are Dragons: Aside from the obvious bird comparison, the Nadders' body plan, gait, and facial structure also bring non-avian theropods to mind.
  • Fragile Speedster: They are capable of matching speed with a Night Fury, but don't have the stamina or durability to keep up with one.
  • The Fighting Narcissist: Deadly Nadders are extremely vain, evidenced by the generous amounts of time spent preening themselves.
  • Our Wyverns Are Different: They share several characteristics with classical wyverns, being very birdlike, four-limbed bipedal dragons with tails bristling with (admittedly non-poisonous) blades.
  • Spike Shooter: Deadly Nadders can shoot spikes from their tail with frightful accuracy. These spikes were the original reason for it being iconic for the Sharp Class before the Tracker Class was discovered between movies.

Introduced: How to Train Your Dragon 2, chronologically introduced first in "Crushing It."
Dragon Class: Tracker

Discovered in the episode "Crushing It," of Race To The Edge, but first seen in How To Train Your Dragon 2, the Rumblehorn also resulted in the discovery of a new classification of dragons: Tracker Class. Described as the bloodhounds of dragons, Rumblehorns serve as the iconic for the class alongside the former Sharp Class iconics, the Deadly Nadders.

  • Everything's Better with Dinosaurs: An easy description of one would be "winged Triceratops."
  • Gentle Giant: Rumblehorns appear to have an instinct to protect, given that a wild Skullcrusher did his best to save humans and dragons he didn't know from a tsunami.
  • Mix-and-Match Critters: Described as a truffle pig mixed with a rhino and a scarab beetle.
  • Scarily Competent Tracker: Called the 'Bloodhound of Dragons' for a reason - Skullcrusher, Stoick's dragon after letting Thornado go, was able to track down Toothless to the Glacial Sanctuary despite no land trail and the scent is coming from a helmet that had been in the water for some time.
  • Super Strength: Rumblehorns can break giant rock pillars by smashing into them, and look no worse for wear afterward.

Introduced: How to Train Your Dragon 2
Dragon Class: Tracker

A free-spirited Tracker Class dragon found in herds.

  • Animal Stampede: Lives in groups for protection, and will often resort to this tactic as a means of defense.
  • Hoist by His Own Petard: They don't fly while stampeding, a behavior that is easily exploited by dragon trappers.
  • The Nose Knows: Has an extremely powerful sense of smell, like many Tracker Class dragons.

Introduced: How to Train Your Dragon 2
Dragon Class: Tracker

A curious Tracker Class dragon with not much of a sense of boundaries.

Introduced: How to Train Your Dragon 2
Dragon Class: Tracker

A hunch-backed Tracker Class dragon.

  • An Ice Person: Breathes out blasts of icy wind.
  • The Nose Knows: Has an extremely powerful sense of smell that can follow targets across the Barbaric Archipelago and supposedly even beyond.

Sharp Class

Introduced: the How to Train Your Dragon movie (mentioned), "Book of Dragons" (described)
Dragon Class: Sharp

A giant Sharp Class dragon, the Timberjack gets its name from its ability to cut down trees with its huge wings.

  • Crippling Overspecialization: The Timberjack's wings are made from two sets of limbs (there's a thumb claw on the top and bottom of them). This makes for an impressive wingspan with a dangerously sharp edge but leaves the Timberjack unable to scratch its own back.
  • Luckily, My Shield Will Protect Me: Timberjack wings can take a lot of punishment, so naturally they use them for defense.
  • Mix-and-Match Critters: A case that involves other dragons, Timberjacks look like legless Typhoomerangs with the head of a Monstrous Nightmare.
  • Meaningful Name: "Timber" and "Lumberjack."
  • Razor Wings: According to the Book of Dragons, Timberjacks cut down trees just by flying into them.

    Speed Stinger
Introduced: "Frozen"
Dragon Class: Sharp

A breed of raptor-like, flightless dragons.

  • All Animals Are Dogs: The injured adolescent the riders find in "The Next Big Sting" begins acting like a dog once they gain its trust, playfully running around Fishlegs and affectionately licking Snotlout's face when he carries it.
  • Beware My Stinger Tail: Anything they sting gets paralyzed for the better part of a day.
  • Decapitated Army: The pack follows an alpha, and will follow it anywhere. The riders exploit this to get them off Berk by capturing the alpha and flying it away from the island.
  • Everything's Better with Dinosaurs: Lacking both flight and a Breath Weapon, they might as well be dinosaurs.
  • Fragile Speedster: They aren't very big or tall and look frail, but they are very, very fast.
  • Instant Sedation: Their poison takes effect instantly.
  • Law of Chromatic Superiority: The alpha has a red crest.
  • Nothing Is Scarier: There is absolutely no information on them in their research notes.
  • The Paralyzer: Their stingers are essentially the Flightmare's spraying mist on steroids.
  • Pint-Sized Powerhouse: Their leader in particular, who breaks free of Hiccup's bola like it was nothing and just yanks Hiccup's shield off his arm with his tail.
  • Raptor Attack: With their super speed and pack hunting, they act like dragon raptors.
  • Super Speed: To make up for the fact that they can't fly.
  • Walk on Water: Some species of Speed Stingers have developed a membrane on their feet so they can run across bodies of water.
  • Zerg Rush: They attack in one massive pack, using their stingers to quickly eliminate any threats before making off with any food they can find.

Introduced: "Have Dragon Will Travel Part I"
Dragon Class: Sharp

A Sharp Class dragon with metallic scales.

  • Absurdly Sharp Blade: The tail spikes of one can casually cut through tree trunks and stone.
  • Child Eater: The adult males are this, having nearly driven the entire species to extinction.
  • Does Not Like Men: Females become violently aggressive towards males of any species during nesting season.
  • Extra-ore-dinary: Its scales are made of metal, including its wings, and the tail spikes that it can shoot.
  • Expy: It greatly resembles the Kushala Daora, but with a horn instead of a rusty snout.
  • No-Sell: Its tail can slice through dragon-proof metal.
  • Poisonous Person: Razorwhips have poisonous tears.
  • Prehensile Tail: A Razorwhip snags its prey with its tail, which is strong enough to uproot a tree.
  • Spike Shooter: Like the Deadly Nadder, Razorwhips can shoot tail spikes.
  • Tail Slap: A long, prehensile, metal tail will most definitely hurt opponents when used as a whip.
  • Technicolor Fire: A Razorwhip's fire breath is blue instead of yellow-orange.
  • Trademark Favorite Food: According to the Dragon's Eye, Razorwhips live chiefly on sea-slugs. Hiccup and the others use this knowledge to locate Windshear.

    Grim Gnasher
Introduced: "Searching for Oswald... and Chicken"
Dragon Class: Sharp

The vultures of the dragon world, these pack hunters prey on the aging and ailing dragons that come to Vanaheim. They can fire their thousands of teeth out of their mouths at would-be attackers.

Introduced: How to Train Your Dragon 2
Dragon Class: Sharp

A large Sharp Class dragon introduced in the second movie. Notable for its four wings and owl-like appearance.

  • Abnormal Limb Rotation Range: Fitting in with their owlish look, Stomcutters can turn their heads all the way around and more.
  • Animal Motifs: The shape of its head, its ability to turn its neck 270 degrees, and a crest on its face resembling a beak, all combine into a dragon with an owl motif.
  • Ring of Fire: A Stormcutter's Breath Weapon is a tornado of fire.
  • Vertebrate with Extra Limbs: It's not unusual for a dragon to have six limbs, but it certainly is unusual for the extra limbs to be a second pair of wings.

Introduced: How to Train Your Dragon 2
Dragon Class: Sharp

A Sharp Class dragon that enjoys rainy weather.

  • No-Sell: The fire of the Raincutter is uniquely unhampered by wet conditions such as heavy rain.
  • Trademark Favorite Food: Worms and grubs, which it emerges to forage for during storms.

Introduced: How to Train Your Dragon 2
Dragon Class: Sharp

A Sharp Class dragon that attacks foes with jets of super-heated air.

  • Blow You Away: The Windstriker superheats air within its body before expelling it in powerful jets to scald enemies.

Introduced: How to Train Your Dragon 2
Dragon Class: Sharp

A reclusive, but loyal Sharp Class dragon.

  • Big Brother Instinct: Normally aloof and shy, but will rise to the occasion to defend its home and friends.
  • The Quiet One: The Thornridge is unusually reclusive among the normally vain Sharp Class dragons, but can be persuaded to join battles for the sake of their pack.
  • The Stoic: The Thornridge is normally content to live in the shadows, striking out when it is called upon and rarely entering the front lines of a battle.

Introduced: How to Train Your Dragon 2
Dragon Class: Sharp

A Sharp Class dragon with a powerful bite and boisterous offspring.

Tidal Class

Introduced: "How To Pick Your Dragon".
Dragon Class: Tidal

One of the original two Tidal Class dragons known in the series, Thunderdrums are large, frog-like dragons who spend most of their time in the water.

  • Early-Bird Cameo: Its first "appearance" is as a drawing in the Dragon Manual in the film. It isn't properly introduced until the show.
  • Flying Seafood Special: Its introduction has it switching from swimming expertly underwater to a flying Lightning Bruiser. The Other Wiki confirms that it is at least semi-amphibious.
  • Lightning Bruiser: Is fast enough to dodge Toothless' fast-firing plasma shots, and strong enough to plow through solid rock without a scratch, or tow large ships single-handedly.
  • Make Me Wanna Shout: It has a sonic scream, though its ability to scream someone's head clean off (as Hiccup narrated in the film) seems to have been an exaggeration, or not shown due to violence restrictions. It can, however, shatter reinforced wood and rock. This makes it one of the two dragons confirmed as not having fire-based breath weapons.
  • More Teeth than the Osmond Family: Its mouth is all fangs and its head is wide enough to hold Stoick the Vast comfortably.
  • Prehensile Tail: It uses its tail to grab Stoick and drag him under without leaving the water itself.
  • Required Secondary Powers: Hiccup speculates that they're deaf to an extent, (At least to their own sonic vibrations, given that tame ones can understand their riders). Additionally, they're immune to other dragon species', (such as the Death Song), sound-sound-based abilities, or hypnosis.
  • Sea Monster: According to The Other Wiki, Thunderdrums are capable of growing to, or exceeding the size of a Blue Whale.
  • Thunder Drum: Related to this trope In Name Only - its sonic scream resembles rolling thunder but has nothing to do with drumming.

Introduced: "Dragon Flower".
Dragon Class: Tidal

A large Tidal Class dragon that lives almost entirely out to sea. Spends most of its time underwater and so is rarely a threat unless it takes a hankering to a netload of fish, or decides to get territorial around a ship.

  • Early-Bird Cameo: Its first "appearance" is as a drawing in the Dragon Manual in the film. It isn't properly introduced until the show.
  • Flying Seafood Special: It is implied in Book of Dragons and shown in Race to the Edge that Scauldrons can fly too, despite being a Water Dragon.
  • Making a Splash: As an aquatic dragon, its Breath Weapon is based on swallowing liters of water and heating them to boiling inside its belly, allowing it to spray targets with powerful geysers of searing water. As with the Thunderdrum above, the book embellishes this ability; the water may be hot, but it's certainly not as dangerous as the book would have one believe, given how easily the attack is blocked.
  • No-Sell: Can eat blue oleander, a flower that is deadly poisonous to all other dragons.
  • Poisonous Person: If it eats the right kind of flowers (which are deadly to other dragons), it becomes one of these. This also makes its venom a good cure for the poison in the flowers.

Introduced: How to Train Your Dragon 2
Dragon Class: Tidal

A manta ray-like Tidal Class dragon with two heads and electrical abilities.

  • Bioluminescence Is Cool: The light from their electricity aside, Seashockers can glow in the dark, a useful ability when one can dive into the deep ocean.
  • Limit Break: Joining the two heads causes a Seashocker to release its electricity in an electromagnetic pulse, allowing for an attack with a large spherical range. Said attack is stronger underwater than in the air, but either way, the Seashocker requires a cooldown period afterward.
  • Mysterious Animal Senses: Living underwater, they benefit from using echolocation to catch prey.
  • Razor Wings: Some are seen cutting through sea ice with their dorsal fins.
  • Shock and Awe: It's in the name, and this ability gets stronger if they join their heads.
  • Zerg Rush: They hunt in pods, much like orcas.

Introduced: "Dire Straits"
Dragon Class: Tidal

A giant, frog-like Tidal Class dragon that is known for creating whirlpools strong enough to drown entire Viking ships.

  • Arch-Enemy: Submarippers and Shellfires are natural enemies, and attack each other on sight.
  • Blow You Away: It can make whirlwinds in addition to whirlpools, meaning flyers aren't safe from it either.
  • Gasshole: A Submarripper's presence is heralded by the foul stench of its breath.
  • I'm a Humanitarian: Humans and dragons alike aren't safe from the Submaripper's jaws. That being said, it is noted that they're not known for attacking humans and usually live in very deep water, far from people.
  • Making a Splash: It can inhale hard enough to create whirlpools and tidal waves, making it a destructive force all on its own.
  • Mega Maelstrom: The whirlpools created by a Submaripper are stronger than any natural whirlpool, to the point of being able to suck down dragons that aren't even touching the water.
  • Retcon: The Submaripper seen in the comics and mobile games was a different looking and behaving dragon, though whirlpools were still associated with it. When RTTE depicted this new one, that dragon was renamed into the Ripwrecker, which was its name in some localizations.
  • Vacuum Mouth: It sucks prey into its mouth through water and air.

Introduced: "Shell Shocked"
Dragon Class: Tidal

A giant, armored Tidal Class dragon with a blue, meteor-like Breath Weapon.

  • Arch-Enemy: Shellfires and Submarippers are natural enemies, and attack each other on sight.
  • Armored Dragons: Unlike the Boneknapper and Armorwing, the Shellfire's armor plating is natural.
  • Dishing Out Dirt/Magma Man: Its Breath Weapon is an explosive half-melted boulder, with the lava part being blue.
  • Long-Range Fighter: It can launch its explosive boulders over a mile. Not that being close to it is any safer.
  • Suspiciously Similar Substitute: A large Tidal Class dragon enslaved by dragon hunters and used as the ace up their sleeve to attack the heroes. The Shellfire even has horns similar to the tusks of a Bewilderbeast.
  • Technicolor Fire: The Shellfire's boulder blasts are blue and explode like fireworks.
  • Turtle Island: Given how big they are, it's only natural for Vikings to have mistaken Shellfires for islands in the past, complete with wrecking their ships on them.

Introduced: How to Train Your Dragon 2
Dragon Class: Tidal

Described as the alpha species, Bewilderbeasts are titanic Tidal Class dragons which naturally tend to find the role of alpha dragon amongst packs.

  • An Ice Person: In a world filled with fire-breathing dragons, Bewilderbeasts deserve special notice for having ice breath. They are even capable of using these to form massive nests.
  • Animal Motifs: Has some leonine characteristics, including a certain majesty and a large "mane" of head spikes. Their tusks and large size in comparison to other dragons also make them resemble elephants.
  • Bizarrchitecture: Bewilderbeasts make these for a living, fashioning near-impenetrable nests out of their ice breath. You wouldn't guess that if you're outside.
  • Cool Crown: Their spines give the allusion of this.
  • Gigantic Adults, Tiny Babies: The Bewilderbeast egg Hiccup finds is the size of a typical dragon egg, i.e. the size of a football. The adult Bewilderbeasts are 500 feet long— 500 times the length of said egg.
  • The High King: See the below quote.
    Valka: Every nest has its queen, but this is the king of all dragons!
  • Icy Blue Eyes: Their natural eye color is light blue. Drago's one appears to have bloodshot red eyes, which is a sign of its abuse.
  • Kaiju: Bewilderbeasts are nothing short of titanic. They're 160 feet tall according to the official website.
  • Lightning Bruiser: A fully-grown Bewilderbeast swims at incredible speeds according to the ''How To Train Your Dragon'' website.
  • Our Dragons Are Different: Bewilderbeasts are unique among dozens of dragon species for having ice breath, tusks, and the ability to command other dragons.
  • Royals Who Actually Do Something: The official website states that Bewilderbeasts are not born into alpha status; it is earned through combat, vigilance, and most importantly, a desire to protect the dragons in its nest. It helps that their massive strength and power makes the task relatively easy for them, but they still earn it.

Mystery Class

    Hideous Zippleback
Introduced: the How to Train Your Dragon movie.
Dragon Class: Mystery, formerly Fear

The Hideous Zippleback was originally the iconic Fear Class dragon but was reclassified when the Vikings of Berk no longer need to fear dragons. This two-headed dragon exemplifies the bizarre nature of its class with its two heads which must work in tandem to be dangerous. One head breathes the gas, the other lights it, resulting in major explosions. The gas itself is also dangerous, but only with long term exposure.

  • I Owe You My Life: They understand the concept of a life debt and will gratefully follow anyone that saves their lives.
  • Knockout Gas: The gas emitted by the right head can be this; after all, breathing flammable gas is never a good thing.
  • Multiple Head Case: Inverted in that the two heads work together quite well, with one providing flammable gas, and the other a pilot light.
  • Multiple-Tailed Beast: Two heads means two tails.
  • Organ Autonomy: The two heads of a Hideous Zippleback are distinct and do not share each other's thoughts. If the heads start arguing, the dragon can stall out, leaving it vulnerable to attack.
  • Rolling Attack: Zipplebacks can turn into a flaming wheel by releasing a large amount of gas before biting onto their tails and set themselves alight, knocking and burning everything in their path.
  • Stuff Blowing Up: Zipplebacks can create explosions when one head breathes gas and the other head generates sparks that ignite it.
  • Weaksauce Weakness: Throw a bucket of water onto the head that sparks the gas and it is unable to light its gas. That said, finding the right head is the trick.

Introduced: "Legend of the Boneknapper Dragon"
Dragon Class: Mystery

A large Mystery Class dragon, Boneknappers earn their moniker due to their macabre habit of assembling an armor of dragon bones to shield their bodies.

  • Arch-Enemy: To Gobber, until it's revealed why.
  • Armored Dragons: Armor made from bones.
  • Bad with the Bone: A cluster of bones at its tail similar to an Ankylosaurus club implies some sort of combat use.
  • Collector of the Strange: It collects the bones of other dragons and wears them like armor.
  • Determinator: The Boneknapper that was Gobber's rival in the short. Its lifelong feud with Gobber has lasted for what can only be described as decades between the two. Even after being attacked by a Hammerheaded Whale and Yak being sent by Thor, not only did the dragon survive, but it continued to hunt.
  • Elemental Armor: The dragon bones it covers its body with qualify as this.
  • Gale-Force Sound: Gains this ability once it has every bone it needs, though it's not as strong as the Thunderdrum's Make Me Wanna Shout ability.
  • Heel–Face Turn: Once a Boneknapper gets all its bones, they become incredibly docile. Best described by Gobber:
    Gobber: You give a Boneknapper whatever it's looking for and it's just like an overgrown puppy dog.
  • Scary Impractical Armor: Zigzagged with the Boneknapper's shell of dragon bones, which seems to be quite practical and is intended mostly to be scary.
  • Skeletons in the Coat Closet: It scavenges the bones of dead dragons to create a coat of armor that can protect its soft hide.
  • The Voiceless: Unless it has every bone it needs for its armor, the Boneknapper can't roar.

Introduced: the How to Train Your Dragon movie (mentioned), "Book of Dragons" (described)
Dragon Class: Mystery, formerly Fear

A four-headed Mystery Class dragon, Snaptrappers are often compared to Venus Flytraps due to their ability to lure prey into their flower-like jaws with a sweet scent.

  • Flower Motifs: When a Snaptrapper's triple jaws are wide open, it looks like a blooming flower, and might even smell like one. However, comparing it to a Venus Flytrap is more accurate.
  • Multiple-Tailed Beast: Snaptrappers have a forked tail, like the Zippleback.
  • Organ Autonomy: Given the Zippleback, it's likely that Snaptrappers have this problem times two.
  • Out of Focus: So far, there hasn't been any material covering Snaptrappers since the "Book of Dragons" short.
  • Poisonous Person: Snaptrappers have the most deadly venom of any dragon.
  • Signature Scent: According to the Book of Dragons, the Snaptrapper can imitate the smell of chocolate. Odd, given that the Vikings didn't have chocolate.
  • Stealth Expert: At first glance, a Snaptrapper would look like a weird plant. This is due to its ability to hold still long enough for prey to fall into its reach.

    Smothering Smokebreath
Introduced: "Breakneck Bog"
Dragon Class: Mystery

Small Mystery Class dragons that dwell in isolated regions. They produce thick clouds of smoke and use this as camouflage.

  • The Collector: They collect any metal items encountered, which they then meld together to build their nests. Justified, as they're rather small in size and use those nests to protect themselves from attacks by larger dragons.
  • Dragon Hoard: Building a nest of metal is clearly intended as a play on this tradition, although it's mostly not precious metal (they were very interested in Snotlout's gold chain, though, because it was shiny).
  • Greed: All the Smokebreaths seen so far will stop at nothing to get any metal they see, much to the ire of humans and Armorwings.
  • The Napoleon: Third shortest breed of dragons seen so far, they're also fiercely territorial and very aggressive. Hiccup and the others didn't even try to train these things!
  • Smoke Shield: Invoked. They make a foggy-like smoke to act as protection, combined with metal scraps, to appear larger and scare others off.
  • Pintsized Powerhouse: Surprisingly strong for little dragons too.
  • Zerg Rush: They attack swiftly and in great numbers to overwhelm (or at least scare off) their victims.

Introduced: "Gem of a Different Color"
Dragon Class: Mystery

A member of the Mystery Class of dragons, Changewings are best known for their chameleonic scales, which make them extremely difficult to find.

  • Constantly Curious: Stated to be their natural personality trait in Book of Dragons.
  • Face–Heel Turn: After the Outcasts tame and weaponize the local Changewing population. They're animals, so they're not inherently evil, but they're certainly being used for evil ends.
  • Hollywood Acid: Not as strong as in many examples of the trope (it can damage stone but can't go through it and it barely scratches metal bars) but the speed at which it melts wood is still uncanny.
  • Hypnotic Eyes: Demonstrated in Book of Dragons that it possesses this ability, though it hasn't used it yet in the series.
  • Invisibility: Can flawlessly blend in with their surroundings. However, in open skies, they are unable to camouflage.
  • Mama Bear: Stealing their eggs is not a good idea. In fact, if multiple eggs are taken, ALL the mother dragons will work together to retrieve them, and they won't leave until they have them ALL back.
  • No-Sell: Not only is their acid non-soluble in water, but underwater, it can dissolve "dragon-proof" metal.
  • Squishy Wizard: For a dragon, anyway. Gobber mentions in the Book of Dragons that their scales are softer as a side effect of their concealment, making them more vulnerable to attack once found.

Introduced: "Fright of Passage"
Dragon Class: Mystery, formerly Strike

The Flightmare is a Mystery Class (originally from the Strike Class) dragon that appears in Dragons: Defenders of Berk. It is among the most terrifying and frightening dragons.

  • Arch-Enemy: To Astrid and her family.
  • Bioluminescence Is Cool: Its diet of glowing algae causes its entire body to glow with bright blue light. This extends to other dragons that eat the algae, but the effect would seem to be permanent (or at the very least quite long-lasting) for the Flightmare.
  • Blinded by the Light: The Flightmare uses this as one of its abilities. As with its general bioluminescence, other dragons can copy the effect.
  • The Dreaded: It was one of the most feared dragon species in the Barbaric Archipelago before the Dragon Riders discovered its true natural behavior.
  • Fear Is the Appropriate Response: Lampshaded by everyone in Berk.
  • Light Is Not Good: The Flightmare glows bright blue and attacks anything it feels is a threat to its food supply.
  • Nightmare Face: It looks more like a ghostly deep-sea creature than a dragon.
  • The Paralyzer: It sprays a mist that causes its victims to freeze up for about a minute, allowing it to eat them with impunity. As most people don't survive this effect, the villagers attributed it to the victims choking in fear at the last moment, a fact which shamed Astrid's family when her "fearless" uncle fell prey to it.
  • Super Spit: Its Breath Weapon. See The Paralyzer above.

    Death Song
Introduced: "Imperfect Harmony"
Dragon Class: Mystery

One of the first new species of dragons the group encounters on their travels. The Death Song gains its name from its ability to lure prey with an Enthralling Siren screech.

  • Animal Motifs: Clearly designed to resemble a butterfly, but it also cocoons its prey as a spider would.
  • Compelling Voice: Lures dragons in with it screeches, traps them in an amber-like substance, and then moves in for the kill at its leisure.
  • Enthralling Siren: From a distance, it sounds like it's singing, and hearing one compels dragons to go towards it against any better judgment.
  • Hoist by His Own Petard: The Death Song's trapping substance can only be dissolved with the heat of its fire breath. So Hiccup jury rigs things so it attacking will free the riders and their dragons.
  • I'm a Humanitarian: It eats the dragons it captures. It also was willing to eat their riders too.
  • Music Soothes the Savage Beast: Death Songs communicate via melody, so Garff is less troublesome when the riders try singing to him. The adult Death Song, on the other hand, doesn't like how they sing.
  • Names to Run Away from Really Fast: This dragon is a flat out equal opportunity predator. There is no room to take chances with one.
  • No-Sell: Their hardened amber can serve as a shield against Slitherwing poison.
  • Tail Slap: The Death Song's unusually long tail is strong enough to knock a Thunderdrum onto its back.

Introduced: "Snotlout Gets The Axe"
Dragon Class: Mystery

A Mystery Class dragon that lacks natural armor, but steals metal objects to create a metal armoring to protect its body.

  • Armored Dragons: It's a dragon that makes its own armor out of scavenged metal.
  • The Collector: Like the Smokebreaths, it collects metal. Like the Boneknapper, its collection is made into armor.
  • Desperation Attack: The Armorwing can set parts of its armor ablaze before flinging them at intended targets. This ability, however, will gradually expose its scaleless body and makes it more vulnerable to its enemies.
  • Dragon Hoard: It collects any metals it can find and hides them away in case it needs to replace any pieces of its armor.
  • Eye Scream: Armorwings have an incredibly bright flame, and blast other dragons in the face to blind them.
  • Selective Magnetism: This dragon is somewhat magnetic, as it needs to affix scraps of metal onto its body somehow. It's too weak of an attraction to be considered Magnetism Manipulation.

    Cavern Crasher
Introduced: "Crash Course"
Dragon Class: Mystery

A large salamander-like dragon that forces other dragons out of their caves and takes over.

  • Breath Weapon: A less powerful variant than most dragons, because it serves more to activate its flammable slime than as a weapon of its own.
  • Child Eater: Eats the eggs and babies of other dragons.
  • Fast Tunnelling: Helped along by its collapsible skeleton and slimy coating, allowing it to slip through smaller openings.
  • Incendiary Exponent: It secretes flammable slime and flings it at its opponents.
  • Lightning Bruiser: Moves much faster than something its size should.
  • Made of Iron: Shrugs off every attack the dragons throw at it, including plasma blasts and massive boulders.
  • Our Dragons Are Different: It has no wings, resembles a giant salamander, flings flammable slime, and can collapse its skeleton to squeeze through cracks.
  • Technicolor Fire: The flames it breathes out are green.
  • Wall Crawl: It can stick to walls like a gecko, giving it a major advantage in caves.

Introduced: "Buffalord Soldier"
Dragon Class: Mystery

A yak-like dragon that was hunted to near extinction because its saliva could cure the Scourge of Odin.

  • Berserk Button: Usually docile, but take it away from its food source and a Buffalord will show its displeasure by inflating, followed by flames and spines.
  • Fantastic Medicinal Bodily Product: It has medicinal saliva which is the only known cure for the disease known as the Scourge of Odin. However, this is only after it chews a special type of grass.
  • Gentle Giant: A dragon of imposing size, but gentle in nature. Until you move it from its island.
  • Implacable Dragon: An inverted example; rather than stopping at nothing to get something, it will stop at nothing to stay where it is. It smashes through dragon proof cages and ship decks with ease to get back.
  • Spike Shooter: When a Buffalord puffs up like a pufferfish, that means it's going to shoot the spines on its body.

Introduced: "Sandbusted"
Dragon Class: Mystery

An aggressive dragon that attacks Vikings with shiny objects and drags them beneath the sand to its underground lair. Fortunately, it can be harmed by direct sunlight.

  • Antlion Monster: Humans that walk through sand patches it hunts in are immediately dragged under.
  • Dragon Hoard: It collects any items from its victims and becomes protective over them.
  • Pinball Projectile: Its glass shots bounce off surfaces.
  • Prehensile Tail: It can coil its tail around humans like a python and drag them underground.
  • Tunnel King: It can burrow through sand like a fish through water.
  • Weakened by the Light: Lives underground because sunlight instantly burns its skin.

Introduced: "No Dragon Left Behind"
Dragon Class: Mystery

Dragons resembling giant snakes with wings, they spit and secrete an extremely deadly poison.

  • Animal Motifs: Snakes. Their red, black, and yellow coloring is reminiscent of coral snakes, and they have the ability to spew poison like a spitting cobra.
  • Artistic License – Biology: As mentioned above, they're poisonous snake-like dragons that have a red, black, and yellow pattern. The problem though is that the red is touching the black as opposed to the yellow, thus making them look like some North American milk snakes, a non-poisonous species. Subverted in that this color pattern is found in some venomous coral snakes in South America and such.
  • No-Sell: Their poison-coated scales cause Death Song amber to slip off before it can harden.
  • Poisonous Person: Not only do they have a venomous bite, but they're also coated in poison. Merely touching one will kill the victim by the next moon.
  • Snakes Are Sinister: They're snake-like dragons that attack on sight.

Introduced: "Loyal Order Of Ingerman"
Dragon Class: Mystery

A Mystery Class dragon with the mysterious ability to replicate the Breath Weapon of any dragon species they see.

  • Everything's Better with Dinosaurs: Dramillions do share some resemblances with some theropod dinosaurs.
  • Invisibility: Being related to Changewings, Dramillions can also flawlessly camouflage themselves (though it seems only their Titan Wing variant can do this).
  • No-Sell: Having both lava and concussive fire blasts, they're able to destroy "dragon-proof" metal on their own (they can weaken the metal with lava and shatter it with a magnesium blast, something no other dragon species could do). Albeit they had to be shown how to do this before they could make use of combining their breath attacks.
  • Power Copying: Able to mimic the fires of other dragons they encounter.

Introduced: How to Train Your Dragon: The Hidden World
Dragon Class: Mystery

A small and round frog-like Mystery Class dragon.

  • Explosive Breeder: The Dragon Riders only brought one Hobgobbler to Berk from their latest rescue mission. When they settle on New Berk, there are dozens or even hundreds of these chubby critters.
  • Extreme Omnivore: When Gobber unleashes a tide of Hobgobblers on an opponent during the final battle, the swarm of razor-toothed little dragons ends up stripping the planks off the deck.
  • The Jinx: Gobber believes they are.
  • Killer Rabbit: Gobber comments on how these plump yet ravenous dragons can breed faster than rabbits.
  • Mix-and-Match Critters: The Hobgobbler is described to be a mix of a bullfrog, a French bulldog, and a beachball, with the fearsome appetite of a piranha.
  • Piranha Problem: Hungry Hobgobblers will devour anything in their path like a swarm of flying piranhas.
  • Zerg Rush: Not all that dangerous alone. Devastating in swarms.


Introduced: "Bad Moon Rising"
Dragon Class: N/A

A mythical dragon that supposedly bites humans to turn them into fellow members of its species.

  • Animal Motifs: Clearly takes inspiration from werewolves, and wolves by proxy.
  • The Dreaded: Upon hearing that he might have been bitten by one, Tuffnut freaks out badly.
  • Meaningful Name: "Lycanwing", as in lycanthropy or being a werewolf.
  • Our Werebeasts Are Different: They're practically weredragons.
  • Real After All: Subverted. While Hiccup begins to panic after thinking that it might be real, he and Fishlegs discover that Tuffnut was bitten by a wolf. The so-called Lycanwing was just made up to scare away marauders. To date, of the three mythical dragons mentioned in the continuity, it is the only one with no actual proof of its existence.
  • Shout-Out: To werewolves in general.
  • Shrouded in Myth: As can be expected from something based on a werewolf.

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