From all kinds of forests, mangroves, to colder habitats, e.g., the Rhesus macaque on the Himalayan foothills and the Japanese macaque in temperate regions of Japan. They also often live near human settlements. Usually single young, twins are rare. Gestation 150-194 days. Average 20, but sometimes up to 100.
Females appear to form the core of the group and males are fiercer among each other.
Macaques eat mainly fruits. Crab-eating macaques will hunt crabs and eat any other marine life they can catch. To complement their varied diets, macaques have simple stomachs. Macaques are stoutly built with strong limbs. They are dextrous with fully opposable thumbs.