Europe and Oceania are a lot less diverse in terms of "habitat zoo animals" than South America. Also several of the South American species are technicalities (Galapagos tortoise, King penguin, Raccoon) or duplicates (Caimans) which artificially inflate the species count.looking at the ratios of habitat animals per continent
we have
59 african 27.2%
59 asian 27.2%
31 north american 14.3%
25 european 11.5%
22 south american 9.7%
21 oceanic 10.1%
this paints a very interesting picture since a majority of people will comfortably say both europe and oceania are well represented / over represented but also say south america has been shafted in the roster but by pure volume they are pretty even and have been for a while. It is also interesting to see people are starting to complain about the african heavy roster but also not mentioning its tied with asia and asia mainly east asia is still the primary non south american region people say is the weakest
also south america has over a quarter of all exhibit animals in the game.
Alsi, the difference between Asia and Africa is that Africa has less biogeographical diversity so it's more noticeable. People lump the gorilla and lion together because they share distribution, but they don't consider the Panda, Dromedary, Red deer, Wolverine and Komodo Dragon as "from the same region".