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. These two types of monkeys live in forests and are sometimes called forest baboons. Baboons belong to the Old World monkey family, Cercopithecidae. The scientific name for the chacma is Papio ursinus.