There are about a thousand mountain gorillas remaining on ... Troops are led by one dominant, older adult male, often called a silverback because of the swath of silver hair that adorns his ...

A juvenile mountain gorilla in Virunga National Park. Neil Ever Osborne Far left, a silverback in Volcanoes National Park. A male mountain gorilla, weighing up to 480 pounds, is far more powerful ...

In what must have been an equally terrifying and thrilling encounter, tourists in Rwanda get up close and personal with a massive silverback mountain ... video is a mature male because of the ...