Primates range in size from the 160 kg male mountain gorilla to the less than 100 gram pygmy marmoset. This evolution has culminated in the versatile human hand with its completely opposable thumb. On the African continent itself we find pottos, bush babies, and lorises. Mostly arboreal, many species with prehensile tails. The only group with cheek pouches for food storage.
Many species are terrestrial or semi-terrestrial.
Many species are largely arboreal. Tail-less primates, with wide chests, and great rotational ability in the shoulders. Also known as the lesser apes, the hylobatidae are adapted to brachiation, and almost entirely arboreal. They live in territorial, small, often monogamous family units. Like the howlers of South-America, some species have special throat sacs to enhance the carrying capacity of their calls.