The Probert Encyclopaedia of Nature

DRILL

The drill (Cynocephalus leucophoeus) is a species of baboon closely allied to the mandrill, but smaller and less fierce. Like the mandrill it inhabits west Africa and differs chiefly in the absence of the brilliant colours which mark the mandrill's face. The face and ears are bare and of a glossy black colour, the palms of the hands and soles of the feet are also naked and of a deep copper colour.
Research Drill