The rules are simple, you may add any animals to a zoological collection anywhere in the world. The animals you choose would have to fit with what is already there and the theming of the zoo if it is themed.The limit of animals that you can have is ten. I'll star off first with some examples. San Diego Zoo Safari Park .Common Hippopotamus .Grizzly Bear .Bonobo .Gelada .African Rock Python .Hirola .Nile Crocodile .South Africa Fur Seal Bronx Zoo .Black Rhinoceros .Gerenuk .Clouded Leopard .Harpy Eagle .Hoatzin .Platypus .Scimitar-horned Oryx .Pygmy Hippopotamus Edinburgh Zoo .Sumatran Orangutan .Grey Seal .Southern White Rhinoceros .Pink Pigeon .Snow Leopard .Sulawesi Crested Macaque .North American Black Bear .Reticulated Python .Humboldt's Penguin .Crowned Eagle