Over thirty years ago, Dian Fossey established the Karisoke Research Center in Rwanda to study the behavior and ecology of mountain gorillas. Some of the offspring of the gorillas first studied by Fossey are still being observed today and the long-term observations on known individuals, from birth to death, and data on social behavior within and among the groups have led to an understanding of many aspects of gorilla social structure. Written by scientists who have worked at Karisoke over the years, this book highlights and summarizes what we have learned about the behavior, ecology, and conservation of the genus Gorilla and two other recognized subspecies and provides some comparisons with other gorilla populations elsewhere in Africa.