Chimpanzee

Chimpanzee, often shortened to chimp, is the common name for the two extant species in the genus Pan. The better known chimpanzee is Pan troglodytes, the Common Chimpanzee, living primarily in West, and Central Africa. Its cousin, the Bonobo or "Pygmy Chimpanzee" as it is known archaically, Pan paniscus, is found in the forests of the Democratic Republic of the Congo. The Congo River forms the boundary between the two species.

Most adherents to the theory of evolution hold the view that chimpanzees and humans shared a close common ancestor.

Measurements

A full grown adult male chimpanzee can weigh from 35-70 kilograms (75-155 pounds) and stand 0.9-1.2 meters (3-4 feet) tall, while females usually weigh 26-50 kg (57-110 pounds) and stand 0.66-1 meters (2.0-3.5 feet) tall.

Lifespan

Chimpanzees rarely live past the age of 40 in the wild, but have been known to reach the age of 60 in captivity, and Tarzan star Cheeta is still alive as of 2006 at the age of 74.

Chimpanzee differences

Anatomical differences between Common and Pygmy Chimpanzees are slight, but in sexual and social behaviour there are marked differences. Common Chimpanzees have an omnivorous diet, a troop hunting culture based on beta males led by an alpha male, and highly complex social relationships; Bonobos, on the other hand, have a mostly herbivorous diet and an egalitarian, matriarchal, sexually receptive behavior. The exposed skin of the face, hands and feet varies from pink to very dark in both species, but is generally lighter in younger individuals, darkening as maturity is reached. Bonobos have longer arms and tend to walk upright more often than the Common Chimpanzee.