The Grey-cheeked Mangabey (Lophocebus albigena) is an Old World monkey found in the forests of Central Africa. They range from Cameroon down to Gabon. The Grey-cheeked Mangabey is a dark monkey, looking in shape overall like a small, hairy baboon. Its thick brown fur is almost black in its forest home, with a slightly rufus/golden mane around the neck. The sexes are similar, with the males slightly larger than the females.