The vervet monkey ranges throughout much of Southern and East Africa, being found from Ethiopia, Somalia and extreme southern South Sudan, to South Africa. It is not found west of the East African Rift or the Luangwa River, where it is replaced by the closely related malbrouck. The vervet monkey inhabits savanna, riverine woodland, coastal forest and mountains up to 4000 m (13,100 ft). They are adaptable and able to persist in secondary and/or highly fragmented vegetation, including cultivated areas, and sometimes are found living in both rural and urban environments. Introduced vervets also occur in Barbados, Saint Kitts, and Nevis. Dania Beach, Florida is also home to about 20 vervets. In spite of low predator populations in many areas where human development has encroached on wild territories, this species is killed by electricity pylons, vehicles, dogs, pellet guns, poison, and bullets and is trapped for traditional medicine, bush meat, and for biomedical research. The vervet monkey has a complex and fragile social system, its persecution is thought to have affected troop structures and diminishing numbers. Multiple organisations are involved in vervet monkey conservation.