Description: Chimpanzee, (Pan troglodytes), species of ape that, along with the bonobo, is most closely related to humans. Chimpanzees inhabit tropical forests and savannas of equatorial Africa from Senegal in the west to Lake Albert and northwestern Tanzania in the east. Individuals vary considerably in size and appearance, but chimpanzees stand approximately 1–1.7 metres (3–5.5 feet) tall when erect and weigh about 32–60 kg (70–130 pounds). Males tend to be larger and more robust than females.
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