Chacma baboons have grayish-brown body hair and a long ruff of hair around the neck. Males occasionally kill mammals and share the meat with other group members. Baboons live in groups of from 10 to 200 animals. A majority of the groups have more females than males. Groups are ruled by several large males.
Hamadryas baboons live in harems composed of one male and several females and their young.
A large number of harems band together to form large groups. The males are fierce fighters and protect the group. Baboons eat eggs, fruits, grass, insects, and roots. They can carry food in pouches inside their cheeks. Drills and mandrills are closely related to baboons.