Colobines are a subfamily of primates known as Cercopithecoidea, which includes monkeys primarily found in Africa and Asia. They are characterized by their long limbs, narrow bodies, and unique digestive systems that allow them to efficiently process leaves and other plant materials. Colobines typically have a complex stomach structure, similar to that of ruminants, which helps them break down tough vegetation. These monkeys are often arboreal, meaning they spend most of their time in trees. Some well-known examples of colobines include the red colobus and langurs. They are social animals, usually living in groups, and communicate through a variety of vocalizations and body language.