Countries: Uganda, Rwanda and the DRC Habitat: Montane rainforest (up to 4,000 m above sea level) Scientific name: Gorilla beringei beringei Population: Estimated 1,100 to 1,200 The Virunga Mountains (which straddle the DRC, Uganda and Rwanda) Bwindi Forest (in southwest Uganda)
Interesting fact: There's talk of classifying the Bwindi gorillas as a separate subspecies to the Virunga gorillas.
Where you can visit mountain gorillas
Eastern lowland gorillas
Country: The DRC Habitat: Forest (between 600 and 2,900 m in elevation) Scientific name: Gorilla beringei graueri Population: Estimated 4,000
Where you can visit eastern lowland gorillas
Interesting fact: There's a gap of nearly 1,000 km between the closest western and eastern gorilla populations.
Western lowland gorillas
Countries: Cameroon, Gabon, the Congo, Angola, Equatorial Guinea, CAR Habitat: Swamp and montane forest (up to 800 m above sea level) Scientific name: Gorilla gorilla gorilla Population: Estimated 110,000
Where you can visit western lowland gorillas
Cross river gorillas
Countries: Cameroon and Nigeria Habitat: Lowland montane forest (from 150 to 2,000 m above sea level) Scientific name: Gorilla gorilla diehli Population: Estimated 250-300
Where you can visit cross river gorillas