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The following are included in the game:

Animal	Biome
American Mastodon	Boreal forest
Ankylosaurus	Wetlands
Aurochs	Temperate forest
Bluebuck	Grassland
Bush-antlered deer	Temperate forest
Carnotaurus	Boreal forest
Cave lion	Alpine
Deinonychus	Tropical rainforest
Deinosuchus	Tropical Rainforest
Dimetrodon	Wetlands
Diprotodon	Wetlands
Dodo	Tropical rainforest
Doedicurus	Scrub
Dwarf Sicilian elephant	Grassland
Elephant bird	Wetlands
Giant camel	Grassland
Giant Ground Sloth	Scrub
Giant warthog	Savannah
Gigantopithecus	Tropical Rainforest
Kentrosaurus	Wetlands
Protarchaeopteryx	Wetlands
Quagga	Savannah
Saber-toothed cat	Boreal Forest
Short-faced bear	Tundra
Sivatherium	Savannah
Stegosaurus	Boreal forest
Stokesaurus	Boreal forest
Styracosaurus	Tropical rainforest
Thylacine	Temperate forest
Triceratops	Boreal forest
Tyrannosaurus Rex	Tropical rainforest
Utahraptor	Boreal Forest
Velociraptor	Desert
Warrah	Grassland
Woolly rhinoceros	Tundra

There is also a killer penguin available only through an extremely poor score in the animal creation mini game.