A macaque or marmoset is a type of SIMIAN, which is an animal belonging to the primate family. Macaques and marmosets are both small primates that are native to tropical regions of South and Central America, Africa, and Asia. They have long tails, and their fur can range from black to brown to gray. Macaques are known for their intelligence and social behavior, while marmosets are known for their agility and ability to climb trees.