The following have been confirmed on the official Zoo Tycoon 2 website:
Animals
File:Extinct Rex.jpg A sleeping Tyrannosaurus , and the list of adoptable animals.
Animal
Biome
Notes
American mastodon
Boreal forest (video, demo)
Ankylosaurus
Wetlands /Tropical rainforest (video/screenshot)
Aurochs
Temperate forest (screenshot)
Bluebuck
Grassland (screenshot)
Bush-antlered deer
Temperate forest (screenshot)
Carnotaurus
Boreal forest (screenshot)
Previously featured in Dino Danger Pack , but with several updates.
Cave lion
Unknown
Deinonychus
Tropical rainforest (screenshot)
Deinosuchus
Tropical rainforest (screenshot)
According to a Blue Fang representative, the Deinosuchus will grow to twice its size, like Marine Mania's whale shark .
Dimetrodon
Wetlands (video)
Diprotodon
Wetlands (screenshot)
Dodo
Tropical rainforest (screenshots)
Doedicurus
Scrub (screenshot)
Dwarf Sicilian elephant
Grassland (screenshot)
Elephant bird
Wetlands (screenshot)
Giant camel
Grassland (screenshot)
Giant ground sloth
Grassland /savannah /scrub (screenshots)
Giant warthog
Savannah
Gigantopithecus
Tropical rainforest (screenshot)
Kentrosaurus
Wetlands /Tropical rainforest (screenshots)
Protarchaeopteryx
Unknown
Saber-toothed cat
Boreal forest (videos, screenshots)
Short-faced bear
Tundra (screenshot)
Sivatherium
Savannah (screenshot)
Stegosaurus
Boreal forest (screenshots, demo)
Stokesosaurus
Boreal forest (screenshot, demo)
Styracosaurus
Tropical rainforest /Wetlands (previous version, screenshots/video)
Previously featured in Dino Danger Pack , but with several updates.
Thylacine
Temperate Forest (screenshots)
Triceratops
Boreal forest (previous version)
Previously featured in Dino Danger Pack but with several updates.
Tyrannosaurus rex
Tropical rainforest (previous version, video, screenshots)
Previously featured in Dino Danger Pack , but with several updates.
Utahraptor
Temperate forest (screenshot)
Certain induviduals have a 'mowhawk ' of feathers on their head, possibly a gender difference .
Velociraptor
Unknown
Warrah
Grassland (screenshot)
Woolly rhinoceros
Tundra (video)
In the downloadable Extinct Animals fansite kit, there is a screenshot of a quagga located under "Animal Renderings". This animal was not listed on the official site's animal page. What this screenshot means is as of now a mystery. Another animal (confirmed through the demo version) is the "giant bullfrog". In order to obtain it the player must get a very low score on the animal creation minigame. It will appear crated in front of the research lab. It has no stats, but the player can still move it. It is a resize of the bullfrog ambient from Endangered Species.