Monkeys are highly intelligent primates that are part of the order Primates. They are found in tropical and subtropical regions all over the world, mostly in Central and South America, Africa, and Asia. Monkeys vary in size, with the smallest being the pygmy marmoset, which can weigh as little as 113 grams (4 ounces) and the largest being the mandrill, which can weigh as much as 37 kilograms (82 pounds).
Most monkeys are omnivores and feed on