The **largest monkey in the world** is the Mandrill. This monkey is primarily found in the tropical rainforests of Gabon, Congo, and Cameroon. It is a highly sociable and vibrant animal, having a very noticeable bright patches of color on its face and bottom.
The adult male Mandrill weighs up to 35 kilograms (77 pounds) and can grow up to 1 meter (3 feet) long.
The female Mandrill is usually about half the size of the male. The tail can reach 40 centimeters (16 inches) in length, and its lifespan ranges between 20 to 30 years.