"If you put 50 male and 50 female chimpanzees that don't know each other into a lecture hall, it would be a social explosion."

Both male and female chimpanzees make the pant-hoot call.

The problems began April 22, when a female chimpanzee jumped into the water-filled moat and drowned.

I went into female chimpanzee "don't hurt me" behaviour - crouch down, turn my back to him.

When female chimpanzees ovulate, they may mate with every unrelated male in the group, despite the dominant male's attempts to control access.

The female chimpanzees were put on birth control to save space for more individuals needing rescues.

Lana (born on October 7, 1970) is a female chimpanzee, the first to be used in language research using lexigrams.

It turns out that female chimpanzees rove much farther in quest of sexual novelty than had been suspected.