The hippopotamus is another animal that can be found in the Congo rainforest, usually in the river. Elephants also live in the rainforest, but only the smaller African forest elephant ("Loxodonta cyclotis"). Another interesting animal in the Congo rainforest is the okapi. The okapi is an interesting species. It is related to the giraffe, but looks more like a zebra. There are other endemic or notable mammals, such as Allen's swamp monkey, the dryas monkey, the aquatic genet, and there is also the Congo peafowl.