Monkeys are classified as primates of whom there are 260 known species. They are typically tree dwelling though some live on the ground. They are active in the day and generally considered to be intelligent. The two major types of monkeys are New World Monkeys (Central and South America) and Old World (Africa and Asia) monkeys. Monkeys also have tails, which apes such as gibbons, orangutans, gorillas, chimpanzees and humans do not. Popular types of monkeys include Squirrel, Macaque, Capuchins, Howler, Spider, Woolly, Owl, Marmosets, Tamarins, Givet, Green, Silver, Blue, Roloway, Vervet, Mona, and Mandrill. You find many great photographic patterns of expressive monkeys in this set including Capachin, Japanese Macaque, Mona Monkey, Grivet Monkey, Golden Lion Tamarin, Mandrill, Black Howler, and Squirrel Monkey.