Cercopithecus aethiops Length (excluding tail) 40–55cm. Weight 4–6kg.
Also known as the green or grivet monkey, the vervet is probably the world's most numerous monkey and certainly the most common and widespread representative of the Cercopithecus guenons, a taxonomically controversial genus associated with African forests. An atypical guenon in that it inhabits savanna and woodland rather than true forest, the vervet spends a high proportion of its time on the ground. It occurs throughout Zambia, preferring belts of tall trees and thicker vegetation within easy reach of water.

The vervet's light grey coat, black face and white forehead band are distinctive – as are the male's garish blue genitals. Vervets live in troops averaging about 25 animals; they are active during the day and roost in trees at night. They eat mainly fruit and vegetables, though are opportunistic and will take insects and young birds, and even raid tents at campsites (usually where ill-informed visitors have previously tempted them into human contact by offering food).