The Mona monkey (Cercopithecus mona) is a species of guenon found in West Africa, occurring in Benin, Cameroon, Ghana, Nigeria, and Togo. Its primary habitat is tropical rainforest; it is diurnal and feeds on fruits, insects, and young leaves, often storing food in cheek pouches. Groups average around 12 individuals and are organized in either one-male multi-female or multi-male multi-female structures. They engage in frequent communication through grooming, facial expressions, scent, and distinctive vocalizations. Its conservation status is Least Concern.