In addition to being the largest monkeys on the planet, the 9 species of baboon and mandrill are also some of the most fascinating. Perhaps their most interesting characteristic is their group structure, either using a One Male Unit/OMU or Multi Male Multi Female Unit/MMU. In this video, we'll cover all 6 species of baboons in the Papio genus, both the drill and mandrill and take a quick look at the beautiful Gelada baboon of Ethiopia.