I like to do combined exhibits a lot, just never predators with prey. Ick.
Gemsbok/Kangaroo - I know that they don't come from the same continent, but they exist well together and eat the same stuff. I think it shows a nice variation on the biome from different parts of the world. And...it saves on space! :blushing:
Musk Ox/Carabou - They do really well together, but they will tend to overbreed their space. You gotta keep an eye on them and a dedicated zoo keeper is just about a must.
Any combination of Savannah herbivores. Generally Gazelle, Giraffe, Giant Sable, and now Wildebeest and warthogs. I'm lovin the warthogs.
I used to do Hippo, gator, flamingo, but I found I lost a lot of flamingo to the gators. Don't do that anymore. The gators are on their own now, but I am enjoying the African Buffalo. You can put those in with any combination and they do fine.
Bison/Wild Horse - Another continental blend, but they look nice together, coxist peacefully, and eat the same things. I don't like clutters of food dishes. Yes. I fire a lot of zookeepers. I like to do them as a central exhibit since we did only really have those 2 for grassland. They made a nice centralized break between biomes or regions.
Camel/Oryx/Fennec - Cluttered food, but a nice combination. They live nicely together, but it's gotta be BIG. They make a nice side note to a large Savannah exhibit, maybe centralized to different Savannah exhibits.
I typically leave the Giant Panda to their own exhibit, but I will do Red Panda in there sometimes. I never combine those two with Peacock. The peacock are just too messy, but I will do Peacock and Red Panda together.
Lemurs will go in just about any non-carnivore rainforest exhibit, but I love them so much they usually get their own space, same with koala.
Gorilla/Chimpanzee - The little and the big!
Crested Gibbon/Orangutan - They're just cute together.