I love all the wildlife in this game and it makes it great and unpredictable. I can't find a full list of all the wildlife in the game. The only list comes from a map but that list is incomplete:

So far I can confirm:

Mugger Crocodile
Demon Fish (based on the Goliath Tigerfish of Africa)
Bengal Tiger
Bear (seems like an Asiatic black bear even though the map shows a Brown bear)
Black Eagle
Pigs (feral)
Wild Boar
Malayan Tapir (unfortunately they are way too small compared to real life. Also they should be dangerous when provoked).
Tortoise
Pit Viper
Asian Elephant
Asian Rhino
Sambar Deer
Gharal mountain goat
Dhole (asiatic Wild Dog or Red dog)
Clouded Leopard
Snow Leopard
Yak
Cows (domestic/Feral)
Crows
Songbirds (few different kinds)

That is what I noticed so far. Did anyone see any other animals? I believe I saw vultures but I am not sure and maybe hawks as well.

The only animal that I am really wondering about if it is.. Did anyone see any Python (big constrictor snake)? It was mentioned on several maps that there should be pythons but I have not encountered any?