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Someone is one species in the original work but a different one in the adaptation. Though this trope sounds simple enough, it does break down in a few different ways.

It usually happens for three reasons, usually relating to the character being an animal in the original:

  • It's part of a Pragmatic Adaptation. If someone was an animal in the original, having them be human is just simpler in a low-budget live action remake. Alternatively, the original animal may be dangerous to work with, hard to get ahold of, or simply fictional which can lead into the second.
  • Sometimes it's just a breed change. If the dog is a Golden Retriever in the original, then they may be a Beagle in the film.
  • It's a consequence of a Setting Update. As values change, sometimes the characters have to be retooled to fit what the audience wants and expects to see. For instance, in many "imaginary" Family Guy episodes that place the family in other locales, Brian can become a sheep, an ox, a pig, etc.

And for how it doesn't qualify:

  • The character switches species during the story. Twilight turning into an Alicorn doesn't invoke this trope for G1 Twilight's character.
  • It's a full species AU. Equestria Girls does not count since everyone in that universe is human.
  • Their birth place is different. Say you read a Star Wars fic where Luke was born on Coruscant. He'd still be labelled as human. Now if he was a Chiss, then it'd be this.

Compare Beethoven Was an Alien Spy for when a real world figure is, sometimes, shown to have not been human.

Examples of Adaptation Species Change include:

Anime and Manga

  • In GoLion, Hiroshi/Pidge was a human. In Lion Voltron, he's a humanoid alien instead. To change the destruction of Earth to the one of Pidge's home planet.
    • Same goes to his "brother" Chip from Vehicle Voltron, whose original self Yasuo was a human too.
  • In Grimm's Fairy Tale Classics's rendition of The old woman in the woods, Elisabeth the maid was aided by a talking owl. In the original tale, it was a talking dove. Subverted: he was a human under a spell.
  • In Transformers Cybertron, Soundwave, usually a native of Cybertron, hails from Planet X which might invoke this for him, depending on what one takes as Planet X's backstory.[1]

Comic Books

Fan Works

And now you can ignore everything we said in the header because this is where this trope truly lives. Reasons for doing it can be simply wanting to explore a fun "What If?" scenario or simply because the author was bored and wanted to see it done.


  • In the original myths, Hercules was a demi-god, the result of Zeus mating with the human Alcmene. In the Disney film, he was born a full god before Pain and Panic made him mortal.
  • In the original Jungle Book film, King Louie was an orangutan. But since orangutans aren't native to India, they made him a Gigantopithecus in the 2016 live-action remake which, while native to India also went extinct... a few million years ago.
  • In the Peter Cushing Dr. Who films loosely based on the first two Dalek stories, Dr. Who and Susan are humans rather than Time Lords.[2]
  • In the How to Train Your Dragon books, Toothless was a Garden Dragon. In the films, he's a Night Fury.
  • The Marvel Cinematic Universe:
    • Drax and Mantis are aliens as opposed to genetically altered humans. Drax is a Kylosian but Mantis' race is this far unnamed.
    • Ego is a Celestial, a race he has no ties with in the comics. Though in fairness, there is some ambiguity on whether or not Ego truly is the last of the Celestials or just a powerful entity that co-opted the name.
      • By consequence, this makes Peter Quill half-Celestial instead of half-Spartax since Ego is a Composite Character with J'son of Spartax.
    • Hela is Asgardian, being presented here as Odin's biological daughter, rather than a Jotun. Fenris also goes form Jotun to Asgardian Wolf.
    • In the comics, Thanos was a Deviant Eternal, the Eternals being a race of humans who were altered by the Celestials and emigrated to Saturn's moon, Titan. In Avengers: Infinity War, Thanos is a Titan from the planet of the same name, unrelated to Saturn's moon. The comics also show that Thanos is a mutant among his kind, hence the Deviant notation, while MCU!Thanos' most notable trait, among his own kind, is his purple skin tone, which was rare in their society but hardly an unseen trait.
    • In the comics, Redwing is a falcon who has a telepathic link with Sam Wilson. In Captain America: Civil War, Redwing is a drone.
    • Thanks to rights issues, Pietro and Wanda Maximoff aren't mutants in Avengers: Age of Ultron. They're humans who were experimented on by Hydra with their powers coming from the energies of the Mind Stone. Something which eventually made its way into the comic.
    • The Elementals were Humanoid Aliens in the comic. In Spider-Man: Far From Home, they're robotic monsters controlled by Mysterio. Also applies to the specific characters being Composited: Sandman, Hydro-Man, Molten Man and Cyclone, who were mutated humans in the comics. Subverted, however, with the Elements of Doom, that are as a whole also composited with the Elementals.
    • Dormammu was a sorcerer who'd ascended to Humanoid Abomination status in the comics. In Doctor Strange, he's an Eldritch Abomination.
  • Sonic the Hedgehog Zig-Zags this. While Sonic has been depicted as being from Earth in the games, he is depicted as being from Planet Mobius in the cartoon shows and the comics. The movie, while mostly being an adaptation from the games, has Sonic come from an alien planet.
  • In The War of the Worlds, the invaders aren't from Mars. Steven Spielberg made this change because of advancing scientific knowledge about the climate of Mars and the likelihood of their being life there.
  • Due to budgeting limitations, the nut-sorting squirrels are replaced by golden egg laying geese in Willy Wonka and The Chocolate Factory. The 2005 film returned brought the squirrels back.
  • In the interest of saving time, in the X-Men Cinematic Universe, Deathstrike, Deadpool, Yukio and Juggernaut are mutants. Silver Samurai gets the opposite treatment, being a human thanks to Decomposite Character.
  • Similar to how Diablo was handed in the Maleficent movies, Hayabusa in the 2020 version of Mulan goes from being a falcon to being a witch who can use her powers to turn into a falcon. Also, Cri-Kee goes from a cricket to a human soldier, and Little Brother is changed into Mulan's human sister.
  • As there is no word for "ogre" in Norwegian, all the ogres in the Shrek franchise became Trolls in that translation.
  • In the 2017 Power Rangers film, Goldar is a massive semi-sentient construct of semi-molten gold rather than a space ape, or a griffon like his Sentai counterpart.


  • In Beast Wars: Uprising, many once organic, human or Nebulan, Headmasters are reimagined as Cybertronians.

Live-Action TV

  • Several characters in Agents of S.H.I.E.L.D. are recast as Inhumans. The most prominent is Quake/Daisy Johnson, whose status as such made its way back into the comics.
    • Ironically inverted with Donnie Gill who is now an Enhanced Human rather than an Inhuman.
  • Arrowverse:
    • The Flash:
      • King Shark was a demigod in the comics. Metahuman here.
      • Likewise, Deathstorm goes from undead to metahuman.
    • In the comics, Waverider was a time travelling hero. In Legends of Tomorrow, the Waverider is team's Cool Starship.
  • In Lost in Space (2018), the Robot is now an alien machine instead of a human built one.
  • War of the Worlds retconned the Martians as coming from a planet called Mor-Tax and re-dubbing them the Mor-Taxians.

Western Animation

  • Avengers, Assemble!:
    • Like his Marvel Cinematic Universe counterpart above, Thanos is a Titan, not an Eternal. Unlike his MCU self, he's explicitly labelled as a Deviant among his own kind, splitting the difference.
    • The Ghost is now an Inhuman who has natural phasing abilities, his suit simply serving as a means of better controlling and amplifying them.
    • Based off his Ultimate Marvel depiction, Tiger Shark is an Atlantean instead of a mutated human.
  • Dagon in Ben 10: Ultimate Alien is based off of the dragon in the tale of Saint George and the Dragon. In the show, he's not a dragon but an Eldritch Abomination.
    • In the 2016 reboot, Diamondhead is now a Subsapien Petrosapien rather than just a bog-standard Petrosapien. Likewise, there's no sign of Ben and Gwen having any Anodite heritage, making them purely human.
  • In the DCAU:
    • Brainiac is reimagined as a Kryptonian AI as opposed to a Coluan. Became rather odd when Justice League Unlimited introduced Brainiac 5 as a Coluan.
    • Supergirl, as part of DC Comics' then mandate that Superman be the only survivor of Krypton, was an Argoan.
    • The alien invaders, the Imperium, in the premier episode of Justice League are clearly based off the White Martians but are invaders from another planet who stole the Martians' shape shifting abilities.
    • Brimstone is a human built robot rather than one created by Darkseid.
  • In Loonatics Unleashed, the Foghorn Leghorn and Pepe Le Pew expies are human.
  • In G1, Scorpan Was Once a Man. In My Little Pony: Friendship Is Magic, Scorpan was born as a Gargoyle.
  • She-Ra and the Princesses of Power:
    • Light Hope was originally a magical beam of light. Here she's an artificial intelligence.
    • Catra was human in the original cartoon, but is now a Catgirl.
    • The original Double Trouble had a human appearance while the new one is noticeably reptilian.
    • Maybe for Adora. She's a First One but it's not stated if First Ones and Eternians are synonymous terms.
  • Madame Webb is a Cosmic Entity in Spider-Man: The Animated Series, as opposed to being the mutant that she was in the comics.
  • In the old Star Wars EU, Depa Billaba was a Chalactan, a race of Human Aliens. In Star Wars: Rebels, the Chalactan became just a subset of human culture.
  • Tales of Arcadia:
    • Steve was a Changeling in the original Trollhunter novel but is human in the series.
    • The Lady of the Lake from Arthurian legend is usually a spirit, a fairy, or a sorceress. In Wizards, she's a horrifying, one-eyed, multi-tentacled sea beast.
  • Transformers:
    • Transformers Armada introduced the Mini-Cons as being creations of Unicron, hinting more than a few times that they were fundamentally different than the Autobots and Decepticons. All later media simply has them as a standard part of the Primus-created Cybertronian species.
    • In G1, the Headmasters were either Nebulans binary bonded to Cybertronian partners (the American version) or small Cybertronians that turned into heads and controlled large drones (the Japanese version). In Transformers Animated, the singular Headmaster is human.
    • In Animated, the Dinobots, Soundwave, and the Construticons are first introduced as advanced human technology (dinosaur animatronics, a musical toy, and construction vehicles respectively) before AllSpark energy reformatted them into Cybertronians.
    • In the G1 cartoon, exactly what the Quintessons were was never made clear (though later media seemed to lean towards techno-organic). In the Transformers Aligned Universe, the novels portrayed them as organic squids in mechanical shells while The Covenant of Primus portrayed them as Mechanical Lifeforms. Transformers vs. G.I. Joe went the unusual route of making them Eldritch Abominations.
    • Transformers: Cyberverse featured this thrice. In the first case, the Sharkticons are a wholly separate alien race, unconnected to the Cybertronians. In the second, Air Hammer and Bantor are now the names of whole interstellar species (that is to say, space-borne animals), not individual fuzors. In the last, the Dweller in the Depths is now a Titan, rather than a Quintesson Trans-Organic.
    • In Transformers: War for Cybertron, Bug Bite appears to be Cybertronian instead of a Go-Bot.
  • Voltron: Legendary Defender:
    • In GoLion/Voltron, Akira/Keith was a pure-blooded human. Here, he's half-human/half-Galra.
      • Interestingly, in the questionably canonical Voltron Force, meant to be a sequel to the original, Keith was revealed as half-human/half-Arusian so this still holds no matter what one considers canon for the original continuity.
    • Hys/Nanny was an Altean/Arusian in GoLion/Voltron. In Legendary Defender, her expy Dayak is Galra.
    • After Voltron had them be Arusians, Allura and Coren are once again Alteans.
    • Pidge is another recursive example. She was a Human Alien in Voltron but is human here, just like in GoLion.
  1. Soundwave is either a descendant of Cybertronians from another reality or a wholly unrelated Mechanical Lifeform whose Cybertronian like biology is merely the result of parallel evolution.
  2. Though in fairness, the idea of Time Lords was still a few years away, and the canon television series had hinted a few times that the Doctor was a human from the far future.