Macaques belong to the Old World monkey family (Cercopithecidae) and are medium-sized primates, ranging from 30 to 60 cm (12 to 24 inches) in length, with a tail of similar length. They have a varied coat color, from brown to gray, and are known for their expressive faces. These versatile primates inhabit a wide range of environments, from tropical forests to mountainous regions and even urban areas.