1.1) Eastern gorilla (Gorilla beringei)

1.1.1) Mountain gorilla (G. beringei beringei)
The mountain gorillas occur in two known populations within three countries, the Democratic Republic of the Congo (DRC), Rwanda and Uganda. One is found among the extinct volcanoes of the Virunga Massif. The Virunga population is now estimated to be 380 .The other population of 320 individuals is found mainly in the Bwindi Impenetrable NP, in south-west Uganda on the border with DRC. Mountain gorillas occupy about 375 km2 in the Virungas and 215 km2 in Bwindi, these areas being separated from each other by 25 km of settled farmland.

1.1.2) Eastern lowland gorilla (G.beringei graueri)
The eastern lowland gorillas occur only in eastern DRC, between the Lualaba River and the Burundi-Rwanda-Uganda border. Its distribution encompasses an area of about 90,000 km2, within which it is thought to occupy an estimated 15,000 km2 in four broad regions: (a) the Kahuzi-Biega National Park (NP) and the adjacent Kasese region; (b) the Maiko NP and adjacent forest; (c) the Itombwe Forest; and (d) North Kivu. Their population is estimated to be 3,000- 5,000

1.2) Western gorilla: (Gorilla gorilla)

1.2.1) Cross River gorilla (G. gorilla diehli)
The Cross River gorillas are the most northern and western of all gorilla populations. They occur in Nigeria and in Cameroon. In Nigeria they are found in the Mbe Mountains, the Afi Mountain Wildlife Sanctuary and the Okwangwo Division of Cross River National Park, and in the Takamanda Forest Reserve (contiguous with Okwangwo), Mone Forest Reserve. In Cameroon, they are found in the Mbulu forest in the southwest. Their population is estimated to be 200-250

1.2.2) Western lowland gorilla (G. gorilla gorilla)
The western lowland gorillas are found in Gabon, the Cabinda Enclave of Angola, the western part of the Republic of the Congo, the extreme southwestern part of the Central African Republic (CAR), south-central and southern Cameroon, and mainland Equatorial Guinea. Their current population is estimated to be 94,000