Chimpanzee

Description:

Their bodies are covered by coarse black hair, except for the face, fingers, toes, palms of the hands and soles of the feet. Both its thumbs and big toes are opposable, allowing a precise grip. The common chimpanzee is both arboreal and terrestrial, spending equal time in the trees and on the ground. Its habitual gait is quadrupedal, using the soles of its feet and resting on its knuckles, but it can walk upright for short distances. The common chimpanzee is a 'knuckle walker', like the gorilla and the bonobo, in contrast to the quadrupedal locomotion of the orangutan, a 'palm walker' which uses the outside edge of its palms.

Notes:

Photographed at Lagos Zoo. Listed as an endangered species on Wikipedia.