Overview
A sudden alarm call, a burst of movement and the rustle of branches may reveal a troop of vervet monkeys nearby. Curious, alert and highly adaptable, these familiar primates inhabit savannah, open woodland and riverine vegetation across much of Tanzania.
Vervet monkeys live in organised social groups containing several adult males and females together with their young. Daily life revolves around feeding, grooming, play, competition and the maintenance of social relationships. Females usually remain in their birth troop, while males leave as they mature and attempt to join another group.
Their flexible diet and intelligence allow them to survive in both natural habitats and areas close to people. They may forage beside rivers, around lodges or near cultivated land, although this adaptability can also bring them into conflict with farmers and residents.
Behaviour & How to Identify
Look for a medium-sized monkey with grey-green fur, a black face bordered by pale cheek whiskers and a long tail measuring around 50–75 cm, often as long as or longer than the body. The hands and feet are dark, while the underparts are paler than the back.
Adult males are noticeably larger than females and can be recognised by their vivid blue scrotum and contrasting red penis. Females and juveniles lack this distinctive colouring.
Vervets spend time both on the ground and in trees. They forage widely for fruit, seeds, leaves, flowers, plant gum and insects, carrying food in expandable cheek pouches before eating it in a safer place.
Grooming is particularly important within the troop. It removes dirt and parasites, but also reinforces alliances, reduces tension and helps maintain social bonds.
Interesting facts
Different dangers produce different alarm calls. Troop members respond according to the threat, such as climbing for a terrestrial predator or scanning the sky for an eagle.
Females remain with their relatives throughout life. Their social position is strongly influenced by their mother and other female family members.
They are adaptable problem-solvers. Vervets quickly learn where food can be found, but claims that wild populations commonly use tools or wash food are not representative of the species as a whole.