Neil Aldridge / Vervet monkey (Chlorocebus pygerythrus) yawning while sitting on a fallen tree in forests, Limpopo River, Kruger National Park, South Africa.

Wim van den Heever / Vervet Monkey (Chlorocebus pygerythrus) baby jumping between branches, photographed mid air. Okavango Delta Botswana.

Gerry Ellis / Black-faced Vervet Monkey (Cercopithecus aethiops) pair playing on camera and tripod, Barbados, Caribbean, native to East and southern Africa

Chase Dekker / Vervet Monkey (Chlorocebus pygerythrus) mother and young, Amboseli National Park, Kenya

Chase Dekker / Vervet Monkey (Chlorocebus pygerythrus) mother and young, Amboseli National Park, Kenya

Ann & Steve Toon / Vervet monkeys (Chlorocebus pygerythrus) Zimanga Game Reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Vervet monkey (Chlorocebus pygerythrus) drinking, Zimanga game reserve, KwaZulu-Natal, South Africa, September.

Frederique Olivier / Vervet monkey (Chlorocebus pygerythrus) feeding, Serengeti NP, Tanzania.

Jen Guyton / Vervet monkey (Chlorocebus pygerythrus) female cradling her young in a Fever tree (Vachellia xanthophloea) near Lake Manyara National Park, Tanzania,

Jen Guyton / Vervet monkey (Chlorocebus pygerythrus) baby sitting in a fever tree (Vachellia xanthophloea), Lake Manyara National Park, Tanzania.

Yva Momatiuk & John Eastcott / Vervet Monkey (Chlorocebus pygerythrus) sub-adult, Kruger National Park, South Africa

Ernie Janes / Vervet monkey (Chlorocebus pygerythrus) Natal, South Africa.