Bonobos are born with black faces and hands, while those of the common chimps are usually pink. Chimps have muscular bodies with long arms and short, slightly bowed legs that give them a sloping back. Aside from size, no major differences between the genders. One young born, twins are rare. In rainforests below 1500m, including swamp forests.
Bonobos spend more time in the trees than chimps, where being lighter and smaller is an advantage.
Bonobos have more arboreal confidence, leaping gracefully among the trees and even walking upright on branches as if on a tightrope. Chimps are by comparison slow and ponderous in trees. But all chimps can brachiate quite well. They can gallop quickly in this way. They usually do this when carrying food in their arms.