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.
Chimpanzees use tools to solve a greater range of problems, than any animal apart from humans.
Sticks or soft stems are use to get ants and other insects by inserting them into holes. They also use sticks or rocks to break open fruits with shells too hard to bite open. Chimpanzee diets are composed mainly of ripe fruits. They also enjoy eating young leaves particularly in the afternoon. In long dry seasons when fruit is scarce, they eat tree seeds, flowers, soft pith, galls, resin and bark.