 
 
A monkey is a member of the order Primates, infraorder Similformes. Monkeys are one of the most diverse groups of mammals, ranging from the size of a mouse to that of a medium-sized dog. They also differ in behavior. Some, like the pygmy marmoset, are able to climb trees, while others, such as baboons, spend most of their time on the ground.
Monkeys are omnivores, eating both plants and animals. However, most species’ diets tilt toward plant matter. For example, New World monkeys’ average diet is 95% plant and 5% animal. Some, such as chimpanzees and gorillas, have diets that are slightly more carnivorous and include meat and invertebrates, including snails, insects, birds’ eggs, lizards and bats. The exact composition of a monkey’s diet depends on the season. During autumn, for example, wild monkeys eat fruits, mushrooms and nuts like chestnuts, walnuts, acorns and hazelnuts.
Most monkeys are social creatures that live in a group called a troop. Some are solitary but most troops consist of females and males. The members of a troop share a large territory and take turns guarding and foraging for food. Some monkeys live in rainforests, others in savannas and deserts and others in rocky mountains. Some, such as the patas monkey (Erythrocebus patas) from Africa and certain baboons from Central America and South America, can survive cold environments, while Japanese macaques that live in snowy regions have thick fur and bathe in hot springs to stay warm.
 
     
     
     
     
     
     
     
     
    