MOUNTAIN GORILLAS are not yet vocal. Their most common sound is the flatulent by product of their vegetarian diet. Actions and body language play a large role in gorilla communication, reinforced by perhaps fifteen distinct vocalization. Most of these vocalizations are quiet brief and appear to serve clearly understood functions. Belch vocalizations contrary to their

much more than their lowland cousins. Their long black hair rounds off the edges of an angular jaws, bony brows, and sharp crests; it softens their otherwise powerful frames. Their faces and foreheads are also less slopes than those of their almost equally long haired cousins, the Grauer’s gorillas of the eastern Congo. Then there