Monkey

A monkey is "any nonhuman primate mammal with the exception usually of the lemurs and tarsiers". Broadly defined, there are three type of monkeys: (1)non-human hominoids (also known as apes), (2)old world monkeys, and (3)new world monkeys. However only the latter two are currently considered monkeys by most biologists. There are about 280 known living species of monkey (260 if non-human hominoids are excluded). Many are arboreal, although there are species that live primarily on the ground, such as baboons. Monkeys are generally considered to be intelligent. Unlike apes, old and new world monkeys usually have tails. Tailless monkeys may be called "apes", incorrectly according to most modern biologists; thus the tailless Barbary macaque is called the "Barbary ape".