The face is black, with blue around the eyes, and has white cheek fur. The nose color varies from white to yellow to black, depending on the sub-species. Behavior Diurnal and arboreal. These guenons live in groups of 7 35. The males split-up and emigrate, while the females remain and defend the territory and young.
Males can sometimes act aggressively toward the young.
Reproduction Females become sexually mature at 54 months, and males at 72 months. Diet Fruit, animal prey, leaves, and gums. More leaves are eaten when fruit is scarce. Predators Other monkeys.