Many unusual animals live in the Congo Basin. The two species of chimpanzee, for example, live only in the Congo rainforests. The large one is the common chimpanzee ("Pan troglodytes"), and the smaller one is the bonobo ("Pan paniscus"). They live in different areas. Also, gorillas live in the rainforest of central Africa. The gorillas of the Congo rainforest are called "lowland gorillas". 