This is taken at the zoo. The Drill is a primate of the Cercopithecidae (Old-world Monkeys) family, closely related to the baboons and even more closely to the Mandrill. The Drill is similar in appearance to the Mandrill, but lacks the colorful face. It is found only in Cameroon, Nigeria, north of the Sanaga River and on the coastal island of Bioko, part of Equatorial Guinea.