Sierra Leone Monkeys

The olive colobus (Procolobus verus), also called the Van Beneden's colobus or green colobus is a primate species in the Cercopithecidae family. It is the smallest specimen of all the Colobine monkeys. It is rarely seen in its natural habitat due to its secretive nature and cryptic coloration.

The western red colobus (Piliocolobus badius), also called the Upper Guinean red colobus, rust red colobus, or bay red colobus is a species of Old-World monkey found in the forests of West Africa, from Senegal to Ghana.

The chimpanzee, also known simply as the chimp, is a species of great ape native to the forests and savannas of tropical Africa. Chimpanzees and humans are thought to have a common ancestor that lived about eight million years ago.

The lesser spotted-nosed monkey, lesser spotted monkey, or lesser white-nosed monkey (Cercopithecus petaurista) is a primate species in the Cercopithecidae family. The lesser spotted-nosed monkey is diurnal, arboreal, and cryptic.

The king colobus (Colobus polykomos), also called the western black and white colobus is a species of Old World monkey found in lowland and montane rainforests.

The Diana monkey is an Old-World primate found in the high-canopy forests of Liberia, Sierra Leone, and the western Ivory Coast. Diana monkeys get their name from the white crescent-shaped headband that resembles the crescent moon on the forehead of the Roman goddess Diana, protector of woodlands and wildlife.

Campbell's Mona monkey, also called the Campbell's monkey or Campbell's guenon is a primate species in the Cercopithecidae family. The species was named after Henry Dundas Campbell in 1838.

The sooty mangabey, also called the white-collared or white-crowned mangabey is a predominantly terrestrial Old-World monkey. Sooty mangabeys remember the location of the fallen fruit and can tell whether or not a tree is bearing fruit.