Amazing adaptations of the Angolan colobus – Zoo Atlanta https://zooatlanta.org/amazing-adaptations-of-the-angolan-colobus/
Adaptations. They are all around us. Some are more visible, such as the cheek pads on a male orangutan, and some are not as visible, such as cheek pouches in
orangutan, and some are not as visible, such as cheek pouches in monkeys or a giant panda