Sclater's Guenon (Cercopithecus sclateri), also known as Sclater's Monkey and the Nigerian Monkey, is an Old World monkey that was first described by Reginald Innes Pocock in 1904 and named after Philip Sclater. It is an arboreal and diurnal primate that lives in the forests of southern Nigeria. It should not be confused with the closely related species, the White-throated Guenon (Cercopithecus erythrogaster), which occurs in Nigeria and Benin. Sclater's Guenon was formerly classified as a...