Start eating solids at 2 months when they change to adult grey, weaned at 6 months. Africa, south of the Sahara, from Somalia to southern Africa. The green monkey was introduced to the West Indian islands of St. Kitts, Nevis and Barbados, probably brought there as pets by African slave traders in the 1600s. Savannah and woodlands bordering water. There is a separate hierarchy among males and females.
Males usually leave the natal group while females stay on.
In vervets, the males appear to be peripheral to the core of related females. To cope with unstable food supplies, these monkeys are able to control their fertility so that they can quickly give birth during times of plenty, while suppressing fertility in bad times. In this way, the vervet, for example, has become the most common monkey in Africa despite the harsh habitat that it inhabits. Some with more limited distributions are particularly at risk. The L'Hoest superspecies group are secretive long-limbed dark monkeys who live in the deep forests.