Macaques live in many different habitats across the globe, making them
the most widely distributed genus of nonhuman primates. Macaques (especially
Macaca mulatta and M. fascicularis) are commonly used in research—most
recently in AIDS research. Their coloration includes gray, brown or black
fur. They tend to be heavily built and medium to large in stature. Males
and females may differ in weight, body size and canine size. (from Nonhuman
Primates in Biomedical Research: Biology and Management pp 41)
Macaques are native to Asia and Northern Africa, but thousands are housed
in research facilities, zoos, wildlife or amusement parks, and are kept
as pets in private homes throughout the world.