Fauna in the World of Avatar

Fauna varies vastly in the World of Avatar, and has a notable characteristic in that most of the animals presented are chimeras - crossbreeds of two real world animals. There are, however, notable exceptions, including Earth King Kuei's pet bear, Bosco (which notably confused everybody in Team Avatar).

Habitats
There are several distinct habitats in the Avatar World, suitable for different animals and plants.

Si Wong Desert
The Si Wong Desert holds the driest, hottest climate of the world. The desert's ecosystem primarily consists of a few scavenger species such as the gilacorn, the large predatory insects buzzard wasps, giant rhinoceros beetles used for transportation, scorpions, and jackalopes.

Great Divide
The Great Divide has various species due to an arid climate. This allows the survival of some creatures, such as the canyon crawlers.

Foggy Swamp
Due to the humid air, the Foggy Swamp has a large variety of fauna. Hundreds of living things are densely packed into the swamp, which is home to many creatures, including glow flies, elbow leechs, screeching birds, and catgators.

Northeastern Earth Kingdom
Vast plains, mountains, and a few temperate forests are scattered across the Northeastern Earth Kingdom. Many habitats are available for a wide variety of species.

Fire Nation (tropical)
The Fire Nation's tropical climate allows rainforests to strive, where many animals, such as the mongoose dragon, the boarcupine, and the badgerfrog live.

Poles
The Northern and Southern Water Tribe's low temperatures don't allow much fauna to live, but there are some which have adapted to their cold environments, such as otter penguins, tiger seals, and buffalo yaks.

Air Nomads

 * Firefly - Bioluminescent flying insect.
 * Flying bison - Large, flying mammals sacred to Air Nomads as the original airbenders.
 * Hermit crab - Crab with a shell-switching lifestyle; covered in a coat of black and white hair.
 * ring-tailed winged lemur - Small animal closely related to winged-lemurs.
 * Winged-lemur - Flying white and black lemurs kept as pets.

Water Tribes

 * Arctic hen - Hen that lives in the arctic; bred for meat.
 * Arctic hippo - Hunted for its blubber.
 * Arctic seal - Swimming mammals that live at the South Pole.
 * Armadillo wolf - Armadillo and wolf cross.
 * Buffalo yak - Buffalo and yak cross; used for transportation.
 * Fish - Of various types.
 * koala otters - Koala and otter cross.
 * Large artic wolf - A large wolf; its teeth are sometimes used in knives.
 * Octopus - Cephalopod that lives in the sea.
 * otter penguin - Penguin and otter cross used for penguin sledding.
 * Polar bear dog - Polar bear and dog cross; feared and hunted.
 * Polar dog - Large dog; kept in Southern Water Tribe as pets.
 * Polar leopard - Polar bear and leopard cross.
 * Polar sea lion - Striped brown seal; hunted for meat.
 * Sea sponge - Aquatic invertebrate.
 * Turtle seal - Brown seal with a hard shell.
 * White hamsters - Small, white rodents.

Earth Kingdom

 * Ant - Small insects that live in large colonies.
 * Armadillo bear - Armadillo and bear cross.
 * Armadillo lion - Armadillo and lion cross.
 * Armadillo wolf - Armadillo and wolf cross.
 * Badgermole - Badger and mole cross; original earthbenders, blind.
 * Bear - A large brown bear; extremely rare.
 * Bearded cat - Domesticated feline with beard-like whiskers.
 * Blue jay - Birds with blue feathers.
 * Boarcupine - Large wild boar covered in sharp, detachable spines.
 * Bull pig - Boar and bull cross.
 * Buzzard wasp - Enormous flying insects which live under the Si Wong Rock.
 * Cabbage slug - Destructive agricultural pest.
 * Camelephant - Elephant and camel cross; used for transportation.
 * Canyon crawler - Spider and crocodile cross.
 * Cat - Fluffy white cat with green eyes or slim beige cat with patches of brown.
 * Cat owl - Large, predatory bird with cat-like face.
 * Catgator - Cat fish and alligator cross.
 * Chameleon - A small lizard with yellowish eyes and a crest on its head.
 * Chicken- Unhybridized chicken.
 * Dog - Unhybridized dog.
 * Dove - Unhybridized pigeons with white feathers.
 * Dragonfly - Dragonfly and lizard cross.
 * Duck - Farmed bird; often roasted.
 * Eel hound - Eel and hound cross; used for transportation on land and water.
 * Elbow leech - Enormous leech; attaches only to elbows.
 * Elephant koi - Enormous Koi fish.
 * Elephant mandrill - Mandrill and elephant cross.
 * Elephant rat - Elephant and rat cross.
 * Frog - Unhybridized amphibian; lives in and near water.
 * Fox antelope - Fox and antelope cross.
 * Gemsbok bull - Bull and gemsbok cross.
 * Gharial hog - Gharial and hog cross.
 * Giant rhinoceros beetle - Giant beetle; used for transportation.
 * Giant fly - Giant bug; eaten in the Foggy Swamp.
 * Giant night crawler - Giant worm.
 * Gilacorn - Small desert-dwelling, egg-stealing lizard.
 * Glow fly - Fly that glows.
 * Gopher bear - Hybrid-like beast of a gopher and a bear.
 * Gorilla goat - Gorilla and goat cross.
 * Hippo - Just a hippo.
 * Hybrid pigs - Domesticated farm animals.
 * Hog monkey - Forest-dwelling ape.
 * Hopping llama - Presumably a llama that can hop, as the name implies.
 * Jackalope - Jackrabbit with large antlers.
 * Leech-A-Pillar - Leech and caterpillar cross.
 * Meadow vole - Small white rodent.
 * Ostrich horse - Large brown bird; used for transportation.
 * Platypus bear - Platypus and bear cross; lays edible eggs.
 * Poodle monkey - Domesticated simian pet.
 * Possum chicken- A possum and chicken cross; lives in swamps.
 * Purple pentapus - Small, five-legged octopus; causes fake illness Pentapox.
 * Pygmy pumas - Smaller, sleeker versions of pumas bred for compact city living.
 * Quilled chameleon - Chimeric reptile found in the densely forested areas of the Earth Kingdom.
 * Rabbiroo - Rabbit and kangaroo cross.
 * Rabbit - A small long-eared mammal sometimes kept as a pet.
 * Reptile bird - Green parrot and lizard cross.
 * saber-tooth moose lion - Moose and lion cross; cubs are non-aggressive.
 * Scorpion - Poisonous insect found in deserts.
 * Screeching dodo - White bird with piercing, shriek-like call.
 * Serpent - A serpent-like seahorse.
 * Se tu - Giant green catfish.
 * Scorpion bee - Stinging, swarming, flying insect.
 * Shirshu - Body of an anteater with a dragon-like head and the nose of a star-nosed mole. Has a very keen sense of smell for navigation.
 * Singing groundhog - Small, brown, furry rodent with musical call.
 * Skunk bear - Skunk and bear cross.
 * Skunkfish - Foul-smelling, oily fish.
 * Sooty copper fritillary - An orange and yellow butterfly.
 * Sparrowkeet - Dove-sized birds, sometimes kept as pets.
 * Spider - Eight-legged, web-weaving arachnid.
 * Spider snake - A spider and snake hybrid with ten eyes.
 * Turkey duck - Turkey and duck cross, bred for meat.
 * Unagi - Enormous eel that inhabits Kyoshi Island.
 * Viper bat - Serpent-like creatures with bat wings found in caves.
 * Wolfbat - Large, snub-nosed bats found in caves.
 * Wood frog - Frog found in swamps with medicinal properties.

Fire Nation

 * Anteater sloth - Anteater and sloth cross.
 * Badgerfrog - Badger and frog cross.
 * Boarcupine - Large wild boar covered in sharp, detachable spines.
 * Camelephant - Elephant and camel cross; used for transportation.
 * Cavehopper - White insect with four legs.
 * Clam - Water-dwelling mollusk; easily affected by pollution.
 * Cow hippo - Domesticated, meat-eating animal with black and white spots.
 * Dragon - Large, horned reptile with a long body; the first firebenders.
 * messenger hawk - Messenger birds of prey with dark red or brown feathers.
 * Dragon moose - Dragon and moose cross.
 * Duck - Farmed bird; often roasted.
 * Eagle hawk - Most likely a cross between an eagle and a hawk. Bird with sharp eyesight.
 * Elephant rat - Elephant and rat cross.
 * Fire ferret - Ferret and red panda cross.
 * Sealguana - Large aquatic reptile.
 * Koala sheep - Koala and sheep cross.
 * Komodo rhino - Komodo dragon and rhinoceros cross.
 * Lion vulture - Vulture and lion cross.
 * Maggot slug - Most likely a hybrid of a maggot and a slug.
 * Mongoose dragon - Mongoose and dragon cross.
 * Puma goat - Most likely a hybrid of a puma and a goat.
 * Raven eagle - Raven and eagle cross.
 * Sea lion - Large aquatic mammal; sometimes used for transportation.
 * Sea raven - Fierce black seabirds.
 * Sea slug - Large slug; sometimes cooked.
 * Snail sloth - Snail and sloth cross.
 * Tigerdillo - Presumably a hybrid between a tiger and an armadillo.
 * Toucan-puffin - Sea birds with large, colorful bills.
 * Turtle duck - Ducks with protective shells.
 * Two-headed fish - Mutated fish found in polluted waters of Jang Hui River.

Spirit World

 * Curly-tailed blue nose - Seen without face.
 * Forest Spirit - Supernatural entity who watches over the forested regions of the northwestern Earth Kingdom.
 * Giant wolf - Giant wolf.
 * Hei Bai - Spirit of a panda bear.
 * Spirit World firefly - Creature made up entirely of glowing light.
 * Tui - Fish that is the Moon Spirit, resides at the Spirit Oasis at the North Pole.
 * La - Fish that is the Ocean Spirit, resides at the Spirit Oasis at the North Pole.

Others

 * Fire ferret - Relative of the red panda (according to its appearances) and the ferret (according to its name).
 * Flying boar - Symbol of the Beifong family; possibly either very rare, extinct, or mythological.
 * Lion turtle - Lion and turtle cross.
 * Pheasant squirrel - A likely cross between a common pheasant and a squirrel.
 * Spider cat - A cross between a cat and a spider.
 * Spiderfly - An insect most likely based on the common spider and fly.
 * spider snake - Spider and snake cross.
 * Squirrel - Just a squirrel. Seen over the Lion Turtle.
 * Two-headed rat viper - Rodent-eating serpent.
 * Walrus yak - A cross between a walrus and a yak.