I've made this topic to discuss any animals-related suggestions that can make fauna even more realistic.

Since the game takes place in 10,000BC, according to Wikipedia, it seems that the following animals were either extinct or very few of them remain (depending also on map/geography):

Extinct species:
elasmotherium: "extincted by 26000BC"
cave_hyena: "completely disappearing from Western Europe between 14-11,000 years ago, and earlier in some areas";
cave_lion: "became extinct about 13,000 years ago";

Endangered species:
ancient_bison: "lived in Late Pleistocene North America until around 10,000 years ago";
megaloceros: "from the early Pleistocene to the beginning of the Holocene"(which "began approximately 11,650 cal years BP" = 9,700BC);
woolly_rhinoceros: "survived as recently as 8,000 BC in western Siberia";
mammoth: "vanished from Europe and southern Siberia about 12,000 BC, [..] some were still present there about 10,000 years ago. Slightly later, the woolly mammoths also disappeared from continental northern Siberia";

So I've removed extinct species from all maps and greatly reduced (or even removed on some maps) endangered ones.

Note that on Savanna map, since the game does not support that fauna, I've used:
donkeys/horses as zebras,
ancient_bison/bison as wildebeest,
ibex as thomson gazelles/elands,
mouflon as Topi,
aurochs as buffalos,
boar as warthogs,
cave_hyena(/wolves) as hyenas,
cave_lion as lions/leopards,
mammoth as elephants,
woolly_rhinoceros as black rhinos.

Let me know your opinions :)