I'm still amazed that my PC still runs this zoo. For some weird reason I always have issues when playing the game when zoos became larger, but for some reason this one is still running without any big issues (sometimes only small moments that the game freezes). With around 7300 guests the park is becoming pretty big and also the collection of animals keeps growing. It is a complete Asia zoo (besides some exhibit animals). Below the countries/regions and the species I have (exhibit species not included) and plan to add.
Japan
Japanese macaque, Japanese raccoon dog
China
Takin, Père David's deer, red panda, red-crowned crane, giant panda, Chinese pangolin
Oceania
Dingo, north island brown kiwi, platypus, quokka, red kangaroo, red-necked wallaby
India
Indian peafowl, Indian rhinoceros, nilgai, blackbuck, lion-tailed macaque
Borneo
Bornean elephant, Bornean orangutan, proboscis monkey, Asian small-clawed otter
Malaysia
Malayan sun bear (to be added: Malayan tapir, siamang or lar gibbon and maybe clouded leopard)
Mongolia (to be added, top left of the picture)
Przewalski's horse, bactrian camel, saiga, Pallas's cat
Probably when all of the above is realised, I will continue to improve the exhibits, because a lot of them are just the ingame fences and big boring squared shaped exhibits.