The mandrill is the largest monkey species in the world.
Mandrills live in the rainforests and forest mosaics of west-central Africa, especially in Cameroon, Gabon, and Equatorial Guinea. Adult males are much larger than females and can weigh more than 30 kilograms, with exceptional individuals recorded at higher weights.
The species is famous for its vivid facial colors: blue and red skin on the muzzle, a red nose, and a colorful rump. These markings are especially prominent in adult males and help make mandrills among the most visually striking mammals.
Mandrills are monkeys, not apes. They have tails, unlike gorillas, chimpanzees, and other great apes. They travel and feed in groups, eating fruit, seeds, fungi, insects, and small vertebrates.