Here is the list of current animals from Zoo Tycoon and Zoo Tycoon 2 that would be able to work within the current game.
Zoo Tycoon:
- Bighorn Sheep
- American Black Bear
- Central or Eastern Chimpanzee
- Emperor Penguin
- African Leopard
- Markhor
- Blackbuck
- Mexican Wolf
- Japanese Serow
- Sumatran Orangutan
Zoo Tycoon 2:
- Nile Crocodile
- Musk Ox
- Black Crested Gibbon, can be swapped for Yellow-Cheeked Gibbon or the Northern White-Cheeked Gibbon
- Florida Panther
- Iberian Lynx
- Spectacled Bear
- Wolverine
- African Spurred Tortoise
- Barbary Macaque
- Gelada
- Gerenuk
- Masai Giraffe
- Honey Badger
- Secretary Bird
- Green Sea Turtle
- Pacific Walrus
- Southern Rockhopper Penguin
- Sea Otter
- West Indian Manatee
some of these are just wrong the sumatran orangutan is undisputedly wrong since it is one of the few animals in zt1 with a scientific name and it is for the bornean not the sumatran orangutan the african leopard is not entirely accurate since given the ingame tile coverage and the zoopedia it is the species not the african leopard subspecies.
the black crested gibbon is the only correct answer since again the scientific name given only applies to the black crested gibbon
you also missed the olive baboon, javan rhino, southern sea otter from zt1, elephant seal / northern elephant seal, mountain gorilla, ethiopian wolf and leatherback sea turtle.
the giant sable antelope should also probably be included as it is a directly named subspecies that isnt in pz.