Chimpanzees, sometimes colloquially chimps, are two extant hominid species of apes in the genus Pan. The Congo River divides the native habitats of the two species: The common chimpanzee, (Pan troglodytes) inhabits West and Central Africa and the Bonobo (Pan paniscus) the forests of the Democratic Republic of the Congo. Chimpanzees are members of the family Hominidae, along with gorillas, humans, and orangutans. Chimpanzees split from the human branch of the family about four to six million years ago. Chimpanzees are the closest living relatives to humans, being members of the tribe Hominini.