@ro, monkeys alone are missing from South America. The most common, charismatic animals are missing.
Howler monkeys, spider monkeys, tamarins, marmosets, uakaris, squirrel monkeys, even a 2nd capuchin
That's also not to count the various birds that can already fit the game mechanics: ibises, spoonbills, curassows, screamers, ducks, swans
And then we're missing some key mammals: spectacled bear, mara, alpaca, guanaco, vicuña, tamandua, Brazilian tapir, ocelot, Chacoan peccary, bush dog
And don't even get me started on exhibit animals: two-toed sloth, vipers, boas, anaconda, frogs, even bats
So, no, South America is not well represented. It's not even close. To be honest, as happy as I am with a fair amount of Oceanian animals, I actually wished that South America got that treatment first since those are animals that people worldwide are far more familiar with that the little blue penguin or the spectacled flying fox.