Monkeys are primates within the infraorder Simiiformes (the “simians” or “higher primates”) and, in common usage, refer to tailed simians, generally excluding apes (and therefore humans). Monkeys are commonly grouped as New World monkeys (Platyrrhini), native to tropical regions of Central and South America, and Old World monkeys (family Cercopithecidae), found in Africa and Asia.
Many monkey species are primarily arboreal, but some are largely terrestrial, notably baboons and several other Old World monkeys. Monkeys are often described as intelligent because many species show complex social behavior, flexible foraging, and learned behaviors that can spread through groups.
