Thursday, March 23, 2006


Interesting article from this month's Dian Fossey Gorilla Fund Field News on the vocalizations produced by gorillas. Includes audio clips of the hoots, grunts and screams mentioned.
Vocalizations are often overlooked as important sources of information about social relationships, particularly calls that are given within the group. Gorillas are very vocal animals. Calls between group members (or what are often called 'close' calls) have been recorded at a rate of almost 8 times per hour (Harcourt & Stewart, 2001). This rate is much more frequent than that of many other social behaviors, such as grooming and playing, and makes vocal relationships a primary component of gorilla social relationships.