Drill Mandrillus leucophaeus

Drill head
Drill male
The Drill is native to tropical forests of West and Central Africa (limited areas of Nigeria, Cameroon and Equatorial Guinea). It is related to Mandrills and Baboons.
Drill
Drill male
The adult breeding male, above, is much bigger than the female and has a pink chin and, like the Mandrill, has blue, mauve and red rump and genitals.
Drill female
Drill female
Drills female
The female, above, doesn't have a pink chin or colourful rump. They live in large, mixed groups.