The white-throated guenon (Cercopithecus erythrogaster), also known as the red-bellied monkey and the red-bellied guenon, is a diurnal primate that lives on trees of rainforests or tropical areas of Nigeria and Benin. The white-throated guenon is usually a frugivore but insects, leaves, and crops are also in its diet. It usually lives in small groups of four to five individual monkeys however, there have been groups of 30 discovered, and in cases, some males wander alone.