The face is usually bare and generally black in color. Younger animals have flesh-colored ears, nose, hands, and feet, and a white patch near the rump. At maturity, the overall skin color is dark, and the fur varies from deep black to light brown. The hair on the head may grow in many directions, and both sexes are prone to partial baldness early in maturity. Males are larger and stronger than females, and have bigger canine teeth which they use in severe fights.
Body proportions are otherwise similar, but both sexes have prominent genitals.
The Common chimpanzee is found north of the River Zaire. They live not only in humid closed-canopy forests but also in relatively dry areas, such as flat savanna. Chimpanzees have similar sensory abilities to people. Their large brains reflect a consistently high performance on all intelligence tests devised by humans, including the ability to learn and use words defined by hand signals in languages used by the deaf. Adults sleep alone, infants with their mothers until the next sibling is born.