Western gorillas are exceptionally large and powerful primates. They have no tails and jet black skin. Facial features include short muzzles, a prominent brow ridge, large nostrils, and small eyes and ears. Western gorillas have large jaw muscles and broad, strong teeth. Coarse, dark hair covers the entire body except for the face, ears, hands, and feet. Generally, the hair on the back and rump of older males grows grey and is lost with age. This coloration pattern has resulted in older males being known as "silverbacks". Western gorillas have a slightly more brown/grey coat color with shorter hair and are usually slightly smaller than mountain gorillas (G. beringei).
Males are usually larger than females, reaching weights up to 275 kg in
Males are usually larger than females, reaching weights up to 275 kg in