|Weight||39 kg (86 lb)||31 kg (68 lb)|
|Whole Body Length||700-800 mm (2.3-2.6 ft)|
Bonobos are sometimes confused for chimpanzees, though their facial features, head shape, and long legs for a more upright posture make them quite different.
In terms of the "social parts of their brain," bonobos and humans are most similar among the great apes.
Image credit: © San Diego Zoo Wildlife Alliance. All rights reserved.
Cramer & Zihlman (1978)
Hakeem et al. (2009)
Myers & Thompson (2002)
de Waal (2001)
Zihlmann (1984, 1996)