A quiet and camouflaged guenon monkey, living in small groups in the West African forest.

Statistics
36-55cm long plus a long tail. Females weigh 2.7kg, males 4.5kg.

Physical description
A long tailed monkey with a grizzled, long coat on the back, darker underparts and limbs, long greyish cheek hairs, a pink mouth, bluish skin around the eyes, bluish ears, and an orange 'diadem' on the forehead.

Distribution
Gambia to Ghana.

Habitat
Rainforest.

Diet
Fruit and insects.

Behaviour
Unobtrusive monkeys, Campbell's monkeys live in small groups of females and their young with a single adult male, usually reaching a group size of only 8-10 individuals.

Reproduction
Breeding is probably similar to other guenon monkeys. A single youngster is born after a gestation period of 5 months, fully furred and with its eyes open. The mother gives birth wherever she happens to be, and birth is usually at night. She eats the placenta and licks the baby clean as it clings to her belly. Other females in the group show great interest and try to hold new infants. Nursing becomes less frequent after the first few months, but continues until the next birth, usually after 2 years. Male offspring leave the group when they reach sexual maturity.

Conservation status
Not currently threatened - its unobtrusive behaviour and camouflage makes it the hardest monkey to hunt in West Africa.

Voice
Much quieter than most guenons.