[[quoteright:300:[[IceAge http://static.tvtropes.org/pmwiki/pub/images/ellie.png]]]]
[[caption-width-right:300:[-She's not just playing possum; she really thinks she ''is'' one.-] ]]

->''He'd heard about children being [[RaisedByWolves reared by wolves]]. He wondered whether the leader of the pack ever had to sort out something tricky like this. Perhaps he'd have to take him into a quiet clearing somewhere and say, Look, son, you might have wondered why you're not as hairy as everyone else...''
-->-- ''Discworld/GuardsGuards'' on interspecies adoption

[[ParentalAbandonment Baby is orphaned]]. [[DoorstopBaby Loving parents find baby]]. Parents [[RaisedByNatives raise baby as their own]]. This is a standard set-up in stories. But sometimes, as the baby grows up, he or she finds out that they're a little... ''different'' from the rest of their family. Really different. Sometimes they notice this, and [[IJustWantToBeNormal start angsting]].

And sometimes, they don't notice anything at all, and are perfectly content with living their lives with their families, no matter how obvious it is that said family isn't their "real" family. This is taken to extreme measures in FunnyAnimal cartoons, where the species is very different but the adoptee doesn't notice.

Usually played for laughs rather than straight these days, due to the dying out of the [[ChangelingFantasy Changeling myth]] and parents these days avoiding keeping adoption a secret from their kids. For the "humans raised by animals" version, see RaisedByWolves. See also NoSocialSkills, the inevitable behavioral problems that come with such an adoption, and HappilyAdopted, which is what they tend to be. Compare/contrast ChocolateBaby, which generally involves [[YourCheatingHeart something]] other than adoption.

----
!!Examples

[[foldercontrol]]

[[folder:Advertising]]
* A [[http://www.youtube.com/watch?v=b0f-NiZfyA0 commercial]] for Newcastle Brown Ale has a light-skinned blond learning "[he] wasn't born a Kapur."
-->'''Friend 1:''' I'm sorry, Sanjay.\\
'''Friend 2:''' ... Is that why your curry is so bad?
[[/folder]]

[[folder:Anime & Manga]]
* ''Franchise/{{Digimon}}''
** Played straight in season 5, ''Anime/DigimonSavers'', in which a boy, Ikuto, is raised by '''Digimon'''. He completely fails to notice a lack of digivolving, the whole "gradual growth" thing he has going, the lack of special abilities, the fact that his name doesn't end in "-mon", and the fact that he bleeds. Also, somehow, he talks like Tarzan despite most Digimon being quite well-spoken. The fact that he was raised by a living snowman from quite an early age and really should have frozen to death upon being rocked to sleep one too many times is never even addressed.
** In ''Anime/DigimonAdventure'', [[spoiler:Izzy was this before the series started, and his parents intended to keep him this way until he'd grown up enough to handle the truth. Unfortunately, Izzy overheard them talking about it one night, which caused him a lot of angst until they were able to sort things out. Trying to keep a secret from any series's SmartGuy doesn't usually work.]]
* In the manga ''Hikkatsu! Strike a Blow to Vivify'', Momoko was raised by pigeons, a fact she casually mentions (to justify her knowledge of pigeon-style kung fu) but never explains despite repeated requests by other characters.
* In ''Manga/ProjectARMS'', Ryo, Hayato, and Takeshi were all taken in at birth by agents of the Blue Men organization. Ryo and Hayato don't realize this until [[TheCallKnowsWhereYouLive the Egrigori come after them]]. Takeshi accidentally finds out sooner, and goes on an angst-trip until he gets over it and saves his sister from danger. All of them pretty much continue to accept their parents as [[HappilyAdopted their own]].
* In ''Manga/RaveMaster'' Yuma reveals at the end of the Blue Guardian arc that the baby Hardner's wife was expecting when she died survived the crash that killed their mother. [[spoiler:Yuma has been raising Nagisa ever since.]] He forbids anyone from mentioning this again, particularly to the adopted child.
[[/folder]]

[[folder:Comic Books]]
* In Creator/JohnByrne's retelling of Franchise/{{Superman}}'s origin, Martha Kent, who had suffered two miscarriages and a stillbirth, was horrified that anyone would shoot off a rocket with a little baby in it. She claimed to have given birth to Clark, and she and Jonathan preserved the secret throughout his childhood -- which, naturally, meant keeping it from Clark. Only when Clark's powers started to emerge did Jonathan confess. In this version of the retelling, they were able to get away with it due to Smallville suffering a blizzard soon after they found Clark that kept them inside for weeks, and due to her previous miscarriages the neighbors bought that she wouldn't have shared news of her latest pregnancy until the kid was actually born.
* Played rather straight in the French comic book ''Les 5 Mondes de Sylfeline''. The human heroine, Sylfeline, is reared by Douniais (basically pudgy gnomes) and believes to be one of them until told the truth on her [[DangerousSixteenthBirthday sixteenth birthday]]... despite being twice as tall as her adoptive parents (and five-fingered unlike the [[FourFingeredHands four-fingered]] Douniais).
* The French comics ''Les Psys'' (The Shrinks) has a couple bring in their kid for help, because though they never told him he's adopted, he got that yelled at him by other kids on the playground and he's been asking himself if he is. Since the parents would rather wait until he's older to tell him, the shrink goes into the consult room and asks the kid why he thinks he's adopted (kid's black, parents are white).
[[/folder]]

[[folder:Comic Strips]]
* ''ComicStrip/{{Garfield}}''
** One series of comics involved Garfield being [[CatUpATree stuck up a tree]] and encountering a cat who was adopted by squirrels.
** A week of strips in 1982 involved a baby chick thinking Garfield was its "mommy" (and later "daddy" when it was corrected). The last strip has Garfield finally getting the chick to go away. The chick forlornly says "[[TearJerker Goodbye, daddy]]." [[spoiler:In the last panel, [[JerkWithAHeartOfGold Garfield sheds a tear]]]].
* The Dog from ''ComicStrip/FootrotFlats'' was raised in a cats' home, by a cat obsessed old lady, and for many years thought he himself was a cat. He got over it. Similarly, Horse originally thought he was a baby coat.
* One gag in the German comic ''Webcomic/NichtLustig'' had a [[EverythingsBetterWithPenguins penguin mother]] tell her adopted giraffe son the harsh, yet so very obvious, truth. In the background, a naked human man can be seen thinking, "Wow, poor guy".
[[/folder]]

[[folder:Fairy Tales]]
* Literature/TheUglyDuckling. Though cygnets ''do'' resemble ducklings, but with a dull pearly gray color.
[[/folder]]

[[folder:Fan Works]]
* In ''Fanfic/EmpathTheLuckiestSmurf'', Empath among the Psyches during his early years, before he found out that he was really a Smurf. He and the other Psyches were led to believing that he was merely a "prototype Psyche".
[[/folder]]

[[folder:Films -- Animation]]
* Thank goodness for ''WesternAnimation/IceAge 2''. The directors had a grand old time with their subplot about a woolly mammoth who had been raised by opossums -- and who played dead and clambered up trees. Somehow. She spends most of the movie trying to sort out her species identity crisis with fellow mammoth Manny's help. The situation is awkward because Manny had, up til then, believed he was the LastOfHisKind, and his motives for helping the only female mammoth he knows come to terms with her species aren't exactly altruistic. Made still ''more'' awkward when one re-watches the original ''Ice Age'' film and realizes that Manny is so conflicted about the whole thing because his wife and son were murdered quite recently. It does explain his extreme over-protectiveness in ''Dawn of the Dinosaurs'', though. Speaking of the third movie, this trope gets played surprisingly straight with Sid and the baby dinos, since he's the first thing they see when they're hatched.
* ''WesternAnimation/KungFuPanda''
** Hilariously dealt with, and {{lampshade|Hanging}}d. Quite obviously, there is no way Po the panda could be the biological son of Mr. Ping the goose, but the issue is never addressed. However, just after the valley is evacuated, and Mr. Ping again impresses on Po that he is meant to be a noodle-maker, this exchange occurs:
--->'''Po:''' I don't know, Dad. Honestly, sometimes I can't believe I'm actually your son.\\
'''Mr. Ping:''' Po, I think it's time I told you something I should have told you a long time ago...\\
'''Po:''' Okay.\\
(''a long pause'')\\
'''Mr. Ping:''' The secret ingredient in my Secret Ingredient Soup!
** Dealt with in the sequel. It turns out that [[ElephantInTheLivingRoom no-one bothered to talk about it despite it being so obvious]] because Mr. Ping is afraid of Po leaving him to find his true parents. Ultimately, Mr. Ping should have had more faith in his adopted son's love.
--->'''Po:''' I just found out that my dad isn't really my dad.\\
'''Tigress:''' Your dad, the goose? [[DeadpanSnarker That must have been quite a shock.]]
* In Disney's ''Disney/{{Tarzan}}'', Tarzan believes himself to be an oddly hairless and skinny gorilla, until Jane and the other humans show up. In the original book, he comes across the jungle hut his shipwrecked parents built for themselves before dying, and from the picture books inside figures out that he's not an ape. He also teaches himself to read.
-->'''Tarzan:''' Why didn't you tell me there were others like me?
* Disney's ''Disney/{{Hercules}}'' has this trope in full force, with the accidentally-exiled baby god being taken in by childless mortals, only to grow up feeling weird and ostracized because of his excessive strength.
* In the French movie ''Les As de la jungle : Opération banquise'' (''The Jungle Bunch: The Movie''), the hero Maurice is an antartic penguin that was adopted by a tiger from the day he hatched. He later himself adopt a tiger-striped ''fish'' as his son. Unlike other example of this trope, Maurice never ''ever'' clues in that he's not a fierce tiger, even after meeting some other penguins (whom he considers "silly-looking birds"). He goes as far as regularly painting yellow stripes on his black plumage to keep the tiger look.
[[/folder]]

[[folder:Films -- Live-Action]]
* ''Film/{{Elf}}'': "Of course you're not an elf, Buddy. You're six-foot-three and had a beard since you were fifteen."
* In ''Film/TheJerk'' (1979), the title character (who is white) is raised the son of poor black sharecroppers. When his adoptive parents reveal "You're not our natural-born child," he responds with "I'm not? You mean I'm gonna STAY this color?" Later in the film, the character is shown to STILL consider himself black. When one of his business advisers uses a racial slur in passing while discussing keeping "negroes" away from the business, he responds "You, sir, happen to be talking to a NEGRO!" He then proceeds to kick the guy's ass with some previously unseen martial arts expertise.
* Barry in ''Film/TheCountryBears'' was raised by humans since he was a cub, though his human brother seems to be [[OnlySaneMan the only one]] that finds having a bear in the family ridiculous. Also invoked by this exchange:
-->'''Barry:''' Mom, am I adopted?\\
'''Mom:''' [[DudeNotFunny No,]] [[BlatantLies of course not, honey.]]
* Inverted in ''Changeling'', where it's the mother who finds out the child is different. In this case though, the mother knew immediately the kid wasn't hers. And its revealed pretty much everyone else, including the boy, involved knew as well, the corrupt police department just wanted to say that the case of the boy's disappearance had been solved.
* The film version of ''Literature/StuartLittle'' plays it kinda straight in the start, but the cute little mouse gets over it quite quickly. His human brother, on the other hand...
* ''Film/SplittingHeirs'' plays this for laughs with its protagonist Tommy Patel, who was adopted by an Indian family living in London as an infant and grows up to be blond, blue-eyed Creator/EricIdle; he's ''stunned'' when his family breaks the news to him.
-->'''Tommy:''' Y-you mean I'm not really Asian?
* Disney's ''The Ugly Dachshund'' concerns a Great Dane who was adopted into a family of dachshunds. The Great Dane grows up thinking he is a dachshund. HilarityEnsues.
* Reversed in ''Film/MurderByDeath''. It apparently took Lionel Twain more than a decade to realize that his adopted son Sydney Wang was Asian.
* Inverted in ''Film/EasyA''; the son is fully aware that he is adopted, while the father is (jokingly) shocked when he nonchalantly mentions it, and demands to know who told him.
* It's sort of noticeable in ''Film/{{Thor}}'' that Loki doesn't quite look like his parents or his brother, and doesn't question it even though it's assumed that he's lived for thousands of years. And even when he discovers his true heritage, he kills his true father and tries to annihilate his own race.
[[/folder]]

[[folder:Literature]]
* ''Literature/{{Discworld}}'':
** Captain Carrot fails to realize he's not actually a dwarf, despite being over six feet tall. In later books, he says that being a dwarf is more about culture and mindset than actually, you know, being a dwarf. He isn't wrong, either. On the Discworld, being a dwarf is a great deal more than mere species. Most dwarfs accept (if not always happily) that Carrot is a very, very, very tall dwarf. There are also people who are biologically dwarfs, but have done away with the cultural trappings, and probably wouldn't be considered dwarfs even by Carrot -- people such as Count Casanunda or Hwel.
** ''Discworld/GoingPostal'' features the eccentric young postal assistant Stanley Howler, who was raised by peas. Not ''on'' peas. ''By'' peas. The mechanics are left to the reader's imagination.
** ''I Shall Wear Midnight'' reveals, not too surprisingly, that Wee Mad Arthur is a Nac Mac Feegle raised by gnomes.
** In ''Snuff'', children's-book author Miss Beedle relates how her mother was raised by goblins, and was quite happy being one until some humans decided to "rescue" her from the only family she'd ever known.
* In ''Literature/TheWheelOfTime'' series, Rand al'Thor is eighteen years old before he discovers that [[MuggleFosterParents farmers]] [[GoodParents Tam and Kari al'Thor]] are not his birth parents. This revelation doesn't change the fact that Rand still [[HappilyAdopted loves them just the same]] and resolutely refers to them as his ''real'' parents, even after uncovering the identities of his [[BlueBlood royal]] biological parents.
* In a ''Literature/{{Dragonlance}}'' short story, an ogre loses his memory in the Cataclysm...and is adopted by a clan of Gully Dwarves. An adult, 9-foot-tall ogre, adopted by a bunch of creatures under 4 feet that can't count to 3. HilarityEnsues. Later he gets his memory back and gets angry...[[CrowningMomentOfHeartwarming but simply can't bring himself to hurt the little creatures that treated him like family]].
* In the ''Literature/{{Dragaera}}'' series by Steven Brust, the Dragaeran [[OurElvesAreBetter Morrolan]] never questions why he's about a foot and a half taller than his adoptive human village, nor why he's still young at more than 100 years of age. It takes another Dragaeran to seek him out and explain things.
* From ''Literature/TheHalfbloodChronicles'', Lashana was raised by shapeshifting dragons and was convinced that she was one who had somehow got stuck in human form - her adoptive dragon brother thought so too! It helps that neither knew that humans and elves existed except as forms for dragons to shift into, being raised in the middle of a desert.
* The ''Series/DoctorWho Literature/EighthDoctorAdventures'' have a strange inversion. The Eighth Doctor adopts a young girl named Miranda who nonetheless has a very StrongFamilyResemblance to him, except for the fact she's blond. They're even the same height once she's fully grown. And apparently neither ever wonders whether they're blood relatives. People who've met both of them tend to be surprised to find out that she's adopted. Miranda's birth father turns out to be [[spoiler:the last survivor of a war that ravaged Gallifrey. Given that children of the Doctor have a tendency to look like the Doctor's previous regenerations, there's a fairly good chance that Miranda and the Doctor are biologically related.]]
-->''If he hadn’t known she was adopted, he’d never have guessed. She looked just like her stepfather.''
* In ''Literature/TheChroniclesOfNarnia'' novel ''Literature/TheHorseAndHisBoy'', Shasta, a boy raised in Calormen, learns he was adopted when he eavesdrops on his "father" talking to a nobleman spending the night at their house. The nobleman was quick to realize this because Shasta has the pale skin of the northern nations while Calormenes are noticeably darker. As his "father" is willing to sell Shasta to the nobleman, he chooses to run away and find his real family, and turns out to be [[spoiler:the long-lost prince of Archenland]].
* In ''Funhouse'' by Diane Hoh, the narrative shifts from third-person to first-person accounts from the villain, who is recalling how he found a diary hidden in his family's attic, revealing that he was adopted, or rather, sold, after his birth parents were financially ruined by an unscrupulous group of businessmen who wanted control of the boardwalk containing the titular funhouse. The diary belonged to the villain's mother, who felt she had no choice but to give her son up because she didn't have the strength to raise him. The villain goes on a RoaringRampageOfRevenge aimed at the teenage children of the owners of the boardwalk, killing one and crippling two in roller coaster accident. [[spoiler: It turns out the villain is in fact the main character's brother.]]
* In the incomprehensible ''Literature/AtlantaNights'', Bruce Lucent doesn't notice he's black and both of his "parents" are white until adulthood. As with most of the book's plotlines, this lasts for exactly one chapter and is never spoken of again.
* In Creator/AndreNorton's ''Literature/TheZeroStone'', Jern first learns he was adopted when his father was dead. His mother uses it to justify her ParentalFavoritism. It enrages him to hear he is not his father's son, but later he consoles himself with the knowledge that his father prefered him because he was in mind more like him than the blood children.
[[/folder]]

[[folder:Live-Action TV]]
* In one episode of ''Series/NewsRadio'', Matthew doesn't figure out that he's adopted until his "identical twin" brother points it out to him. This despite the fact that the two look ''absolutely'' nothing alike; Matthew is played by gangly, blond Andy Dick, while his twin brother is played by Creator/JonStewart. Turns out at the end of the episode that Matthew knew he and his brother weren't really twins, but kept pretending he did so that his brother wouldn't catch that HE was the adopted one (an unseen photo of their parents confirms Matthew is their biological child by nature of a startling resemblance). One wonders why their parents didn't tell them they were ''fraternal'' twins. There's also a line suggesting they're not the same age, making it unclear why they were called twins at all. Then again, Matthew's parents could be as strange as he is.
* In ''Series/ArrestedDevelopment'', [[spoiler:Lindsey Bluth was adopted, and her parents claimed she was Michael's twin sister... in spite of her being three years older than him. Lucille {{hand wave}}d her going through puberty by simply claiming she was becoming fat]].
* Greg's father from ''Series/YesDear'' spent much of his life without knowing he was adopted.
* {{Justified|Trope}} on ''Series/TheGeorgeLopezShow'' -- George's family is Hispanic, but since his sister's adoptive parents are Italian the racial issue wasn't glaring enough to clue her into the truth. Apparently she had to "correct" people who thought she was Latina fairly often before [[PassFail finding out it was true]], though.
* One episode of ''Series/ThirtyRock'' had the characters' mothers appearing on the show. Danny (who is white) reveals he has an Asian mother, which someone comments on and thus him realizing he was adopted.
* Inverted in a frightening way in the ''Series/DoctorWho'' story "Night Terrors". The Doctor visits a little boy that's scared of everything with a mysterious cupboard giving him off-the-scale readings on his Sonic Screwdriver. When asked about his birth, the father reveals his wife [[spoiler:can't have kids.]] The Doctor reveals [[spoiler:the kid is an alien and is using a perception filter to make it seem like they always had him.]]
* In the MadeForTVMovie ''Series/KnightRider 2010'' Jake, the lead character, was adopted at a very young age by a black man. As an adult, the man tells Jake he's not his real father. "I know... I have no sense of rhythm."
* Another MadeForTVMovie, ''Based on an Untrue Story'', features Morgan Fairchild, who never questions the fact that her parents are Asian and she's a tall blonde up until the minute the plot requires it.
* In ''Series/{{NCIS}}'', Abby discovered she had a biological brother named Kyle whom she never met after undergoing a blood-test in order to donate a kidney. She later compared her own DNA to that of a strand of her mother's hair she kept in a locket, and discovered that the two samples didn't match.
-->'''Abby:''' I can't imagine the wonderful loving parents that raised me and Luca ever giving up a child. But they would have adopted a child. And they did... me. [[WhamLine I'm adopted, Gibbs]].
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/SuperMarioRPG: Legend of the Seven Stars'', Mallow is first encountered as an oblivious adoptee (he is a Cloudy/Marshmallow being and his family are ''frogs''). His reason for joining the party thus ends up being to search for his birth family. [[http://youtu.be/p6EhCfDtupc?t=10m9s The game does play his obliviousness (and most of the other tadpole's) for laughs.]]
* ''VideoGame/StarOceanTheSecondStory'' is kinda silly about this, as her pointed ears make it kinda obvious Rena is not only adopted, but a different species from the rest of her village. The Town Elder doesn't want to bring it up. [[VideoGame/StarOceanTillTheEndOfTime The third game]] {{justified t|rope}}his in the in-game encyclopedia; because expellians are a hybrid race, they have a much wider variety of physical features than other [[HumanAliens humans]]. So while Rena's ears were a bit unusual even by their standards, they didn't actually stand out that much. Also, Rena isn't oblivious to adoption. Everyone only thinks she is. She ''was'', [[{{Flashback}} but overheard her adoptive mother and the town elder talking about it after her adoptive dad died]]. (Mom wants to tell Rena she's adopted, the elder somehow talks her out of it.) By the time the game begins, she's known for a few years. Though [[spoiler:she doesn't find out she's a different species until Disc 2]].
* In the reboot of the ''Franchise/SpyroTheDragon'' series, the title dragon was adopted by dragonflies. While they do tell him that he's not their ''biological'' son, they reassure him that they will always be his "real" family nonetheless. The Oblivious comes from the fact he never figured out he wasn't a dragonfly despite the fact he's many times their size, can't fly (yet), and has ''legs''. He'd never seen a dragon before in his entire life and the dragonflies hadn't either, so there's no way he could've know ''what'' he really was, but those should have at least been a clue.
* The Flut Flut in the first ''VideoGame/JakAndDaxter'' game very briefly adopts Daxter as its mother, despite being approximately 50 times the little orange rodent's size (they milk one joke out of this, and then it turns into a steed -- but never again chirps "Mama" in Daxter's direction).
* ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time]]''. Hey, Link, guess what? [[spoiler:You're not a Kokiri!]] Seen to a lesser extent in ''[[VideoGame/TheLegendOfZeldaTwilightPrincess Twilight Princess]]'', where Link is an orphan living among the Ordon villagers. His long ears give away his Hylian descent (despite Shad insisting he's not from "Hyrule proper"), but the rest of the villagers have human ear shapes, which might imply they come from a different ethnic/racial background in Hyrule. Given how popular and well-liked he is, though, it's clearly a superficial issue at most.
[[/folder]]

[[folder:Web Comics]]
* Parodied in [[http://www.sluggy.com/daily.php?date=010506 a storyline]] in ''Webcomic/SluggyFreelance''. Torg snaps under the stress of his life and becomes "Torgo of the Jungle" (again), and is adopted by a family of centipedes infesting his filing room.
-->'''Narrator:''' Living in peace behind pieces of furniture, scurrying under old paperwork, Torgo deals with the fact that somehow, he is different.\\
'''Torg:''' Pa? Why don't I have poison glands and two pairs of maxillae?\\
'''Pa:''' 'Cause you're a freak. Now put Comedy Central on, it's time for ''Series/TheDailyShow''.
* Ozy from ''Webcomic/OzyAndMillie'', a fox, knows he's adopted but still sees the Llewellyns (dragons) as his "real" family. However, he does seem to have odd ideas about what normal family activities actually are, given his loopy relatives. And the Llewellyn family curse seems to regard him as one of the family; in fact, he's the only family member it has any noticeable effect on since he's the only "dragon" with fur. Ozy did meet the person who was quite probably his biological father once. Upon learning this, Ozy decided to spend the day with the father who raised him, rather than the father he had never met before (and as far as we know, never saw again).
* ''Webcomic/LoveMeNice'': Carolina was somewhat taken aback to discover that she was a toon. At first, it's not established whether they deliberately didn't tell her because they thought the inevitable conversation would be awkward, or if they assumed she'd take a look in a mirror now and again and figure it out. A later flashback shows Carolina's mother dodging the question of why she had weird ears, and apparently allowing her to believe she was deformed, which strongly suggests the former.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/RockosModernLife'' has Heffer being surprised he's adopted after Rocko brings it up at a dinner visit to his family. Rocko, at least, found it obvious, as Heffer is a steer and his family are ''wolves''. Who originally raised Heffer so that they could eat him, incidentally. They came to love him and changed their plans, of course.
* On ''WesternAnimation/SpongebobSquarepants'', Mr. Krabs, [[SpeciesSurname a crab]], is the proud father of Pearl, a whale. The show treats this as an ElephantInTheLivingRoom[=/=]UnusuallyUninterestingSight.
* Done in ''WesternAnimation/TheAngryBeavers'' with the [[CompanionCube (mostly) inanimate character]] Stump, in the episode "Stump Looks for His Roots". After showing off slides of his family, Norbert points out that Stump must be adopted (or a "transplant", as he puts it), since Stump is an oak, and his parents are elms.
* Ike on ''WesternAnimation/SouthPark'' is an interesting example: while Ike himself is just a baby, his older brother Kyle was apparently unaware that Ike was really adopted from Canada, though Canadians on ''South Park'' are animated differently than Americans. Subverted somewhat in that ''the viewer'' couldn't be sure of this, either; this episode is basically what established that rule, though Canadians had been shown animated differently before (on a ShowWithinAShow, which could have been another explanation for [[StylisticSuck the style difference]]).
* ''WesternAnimation/GrowingUpCreepie'': It's rather obvious that Creepie knows that she's adopted, since her parents are ''bugs'', although she never talk about it, since she's happy with them.
* An episode of ''WesternAnimation/TomAndJerry'' had a duckling imprint on Tom and remain oblivious to Tom's attempts to eat him (despite Jerry repeatedly saving him and trying to illustrate the difference between cats and ducks). When the duckling finally figures things out, he decides to let Tom eat him anyway, though of course [[CrowningMomentOfHeartwarming Tom can't bring himself to do it]].
* Buddy from ''WesternAnimation/DinosaurTrain'' is a young TyrannosaurusRex raised by Pterodactyls.
* ''WesternAnimation/UglyAmericans'': Lionel, Leonard's apprentice, 'son' and heir to the title of Wizard of Social Services (also a Franchise/HarryPotter Expy, second in the series), was abandoned at a Chinese restaurant. He speaks English with a British accent, despite being raised by Chinese immigrants. He's also 50 years old despite being a child, physically.
* A [[http://tylerkungpao.tumblr.com/post/35365952684 cut scene]] from the ''WesternAnimation/AdventureTime'' episode "The Lich" was going to reveal that [[KidHero Finn]] didn't realize he was adopted, despite being raised by talking dogs. This may have been cut for pure FridgeLogic: he ''does'' specifically know that he's human ([[LastOfHisKind it makes him soul-searchy]]) and "Memories of Boom-Boom Mountain" shows that he [[NoInfantileAmnesia apparently remembers]] his adoptive parents finding him in the woods.
[[/folder]]

[[folder:Real Life]]
* Cuckoos. [[http://en.wikipedia.org/wiki/File:Reed_warbler_cuckoo.jpg This picture]] shows just how obvious it should be to the chick's new parents.
* TruthInTelevision for people. [[http://en.wikipedia.org/wiki/Feral_child Feral children]] who are raised by animals take up the habits and behaviors of the animals they're raised by, including that animal's attitude towards humans, be it fear or indifference.
* An unusually irritating version. A woman wrote into an advice column, telling about the time when she commented on an Asian baby's adoption by white parents and the parents blew up that she had "given it away."
* Also TruthInTelevision with animals.
** Dogs have been known to protect [[http://snopes.com/photos/animals/bella.asp fawns]], and in one case an orphaned [[http://snopes.com/photos/animals/finnegan.asp squirrel]] was adopted by a mother dog and raised among her litter.
** Most dogs will adopt a kitten into their homes quite easily, which can often lead to odd behavior later in the cat's life.
** In one case in South Carolina, a lost dog who didn't even appear to have a litter was rescued as she was [[http://www.10news.com/news/dog-found-lost-in-south-carolina-nurses-nurtures-month-old-kitten05182013 nursing a month-old kitten]].
** Some domestic cats have adopted baby squirrels and possibly even guinea pigs.
** To say nothing of the [[http://boingboing.net/2005/12/28/tale-of-the-tortoise.html tortoise and the baby hippo]] it adopted.
** A female tiger in a [[http://www.snopes.com/photos/animals/tigerpig.asp Chinese zoo]] adopted a litter of piglets.
** Similarly, it's actually not rare for a lioness whose babies have died to adopt a baby antelope... which usually gets killed by the other lions in her pride, unfortunately.
** One informative children's book says that cats before a certain age will not kill things like squirrels. The picture accompanying that statement was so saccharine as to [[TastesLikeDiabetes give one diabetes]].
** There's even one story from a couple years back of a lioness rescuing an African girl from a group of men who were trying to force her into marriage with one of them, since her cries sounded like those of a lion cub. They found her later being cared for by lions.
** [[http://cheezburger.com/917416704 This picture.]]
** There's an equally TastesLikeDiabetes [[http://www.youtube.com/watch?v=04RZrf3-Mgo video]] on Website/YouTube of a cat adopting a baby rabbit. I suppose that if you have that many kids, you feed anything that meeps.
** Although not precisely adoption, there was [[http://chicago.cbslocal.com/2011/08/16/15-years-ago-today-gorilla-rescues-boy-who-fell-in-ape-pit/ a case]] when a human toddler fell into an animal enclosure at a zoo and was picked up and carried to the exit by a female gorilla.
* Let's not forget [[http://en.wikipedia.org/wiki/Imprinting_%28psychology%29#Filial_imprinting imprinting]], most easily observed in chickens and waterfowl. The article mentions a group of goslings believing that ''a pair of wading boots'' was their mother.
* [[http://www.cracked.com/article_19463_5-real-animal-friendships-straight-out-disney-movie.html This]] Cracked article, TastesLikeDiabetes abound.
* Society finches have been domesticated for centuries and breed very well in captivity, while many other finches will abandon eggs easily in captivity. It's very common to have society finches raise eggs for other types of finch.
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