The Capuchin monkey is a genus of New World monkeys that includes about 35 species. They are found in tropical forests from southern Mexico to northern Argentina. Capuchin monkeys are small to medium-sized monkeys, with a body length of about 30 to 50 centimeters and a weight of about 2 to 5 kilograms. They have a distinctive appearance, with a rounded head and a long, prehensile tail that is often used for climbing. Capuchin monkeys are also known for their intelligence and their social behavior. They live in groups of up to 100 individuals, and they have a complex social hierarchy.