Torn between can be left out entirely and doesn't need to make it but sure, I legitimately forget it's even in the game but its model is... fine I guess? While it's nice to have variety, the bonobo really only differs from the chimp in some slight visuals - unless they decide to expand on some social structure systems it's virtually the same animal in-game (same region, same biome, same behaviors, only slight difference is some group sizing, etc). Aside from some super visually distinct animals like the lemurs, when I want variety I usually mean things like having two different flamingos from two different continents and/or with different climate suitability, not what is pretty much the same animal with a different coat of paint (again, in-game. I know how distinct they are IRL).
I think I'll go with can be left out entirely: because otherwise, I know it's just gonna be a certain lonely brown bear sitting down there lol.