Your local zoo has just acquired an additional 20 acres. They are wanting to develop the new property into a distinct state of the art geo-climatic zone for the zoo. With such a large space they really want to increase the number of species at the zoo. So the minimal amount of mammal species is 10, the minimal amount of bird species is 20, the minimal amount of reptile/amphibian species is 10, and you can have as few or as many invertebrates/fish as you want.
Some suggestions for regions include:
-Equatorial African forests
-Grassland Africa
-Indonesian rain forests
-South east Asian rivers
-Brazilian savanna
-Amazon
-the Australian outback
ect ect, if you have any questions feel free to ask!