Eastern Black and White Colobus Monkey | Utah's Hogle Zoo - Colobus thumb
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The first one is going to be another well-known adaptation, and that is their thumb, or lack thereof. It is often a misconception that colobus. The black colobus (Colobus satanas), or satanic black colobus, is a species of Old World monkey belonging to the genus Colobus. The species is found in a small area of western central Africa. Black colobuses are large, completely covered with black fur, and like all other Colobus monkeys, do not have a thumb.