Do Gorillas communicate among themselves or call it GORILLA VOCALIZATIONS
Twenty-five distinct vocalizations are recognized, many of which are used primarily for group communication within dense vegetation. Gorilla Sounds are classified as grunts and barks are heard most frequently while traveling, and indicate the whereabouts of individual group members (Harcourt et al. 1993). They may also be used during social interactions when discipline is required. Screams and roars signal alarm or warning, and are produced most often by silverbacks. Deep, rumbling belches suggest contentment and are heard frequently during feeding and resting periods. They are the most common form of intra group communication (Fossey 1983).
Because of the extensive research begun by Dr. Fossey and since carried on by the Dian Fossey Gorilla Fund International and other gorilla conservation groups, the mountain gorilla is one of the most understood of all gorillas. The general consensus of those who work closely with the mountain gorillas is that they are generally peaceful and gentle.
This doesn’t mean that they won’t occasionally charge, scream or show their teeth, to an outsider or within the group itself. Most of these Mountain Gorilla actions are meant to serve as warnings, to ward off danger or to prevent a fight. Mountain gorillas can communicate in a variety of ways, including facial expressions, sounds, postures and gestures. There is the classic chest beating by male gorillas, which is used to show stature, scare off opponents or even to prevent a fight. When the Mountain Gorilla feels threatened they can make a variety of loud sounds, resembling roars or screams. Facial expressions are mostly used as communication. An open mouth with both upper and lower teeth showing means regressions. A closed mouth with clenched teeth could signal anger.
One of the nicest sounds is heard when the group is resting after a period of feeding. Mountain gorillas roughly spend 30% of their day feeding, 30% moving, and 40% resting. At dusk, they prepare to settle down for the night and sleep in nests made of vegetation that the gorillas shove under and around them. Forming of nests is mainly the bending of soft trees, breaking mature bamboo sticks and other tree species that have broad leaves to provide a blanket and shield against the cold. Mothers find a comfortable spot where their backs will be supported as they breast feed and cuddle their babies for the night.
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