Mammals:
* Primates: Monkeys (howler monkeys, spider monkeys, capuchin monkeys), apes (gorillas, orangutans), lemurs
* Big Cats: Jaguars, leopards, tigers (in some Asian rainforests)
* Other Predators: Pumas, ocelots, jaguarondi
* Ungulates: Tapirs, deer, wild pigs
* Rodents: Squirrels, agoutis, pacas
* Bats: Fruit bats, insectivorous bats
* Sloth: Two-toed and three-toed sloths
* Anteaters: Giant anteaters, tamanduas
* Armadillos: Nine-banded armadillos, other species
Birds:
* Parrots: Macaws, cockatoos, parrots, parakeets
* Birds of Paradise: Known for their incredible plumage (found in New Guinea and surrounding islands)
* Toucans: Colorful and large-beaked birds
* Hummingbirds: Tiny, fast-flying birds
* Hawks: Various species
* Owls: Various species
* Woodpeckers: Various species
* Cuckoos: Various species
Reptiles:
* Snakes: Boas, pythons, vipers, and other snakes
* Lizards: Iguanas, chameleons, geckos
* Turtles: River turtles, tortoises
* Crocodiles and Alligators: Found in some rainforests
Amphibians:
* Frogs: Poison dart frogs, tree frogs, bullfrogs
* Salamanders: Various species
Insects:
* Butterflies: Morpho butterflies, swallowtail butterflies, and many more
* Beetles: Stag beetles, dung beetles, leaf beetles
* Ants: Leaf-cutter ants, army ants
* Termites: Various species
* Moths: Various species
* Grasshoppers: Various species
Other Animals:
* Fish: Various species, including piranhas in some rainforests
* Invertebrates: Crabs, spiders, scorpions, centipedes
Important Note: This is just a brief overview. The specific species found in a rainforest depend on its location and specific climate.