The single species of Gorilla is divided into three subspecies of gorillas. One of the sub-species is the western low-land gorilla found in Nigeria, Cameroon, parts of central Africa Republic, mainland Equatorial Guinea, Gabon, Conga and the extreme western tip of Zaire. The eastern lowland gorilla, graueri, is found in east-central Zaire, and the maintain gorilla, beringei, is restricted to the six extinct volcanoes of the Virunga Range on the Zaire- Rwanda-Uganda border.