The mountain gorilla is a subspecies of the eastern gorilla, found primarily in the mountainous regions of Virunga National Park in Rwanda, Uganda, and the Democratic Republic of the Congo. They are known for their thick fur, which helps them survive in cooler climates, and their robust build, with adult males weighing up to 440 pounds. Mountain gorillas live in social groups led by a dominant male known as a silverback. These groups typically consist of several females and their offspring. They primarily feed on leaves, stems, and fruits, and are considered critically endangered due to habitat loss and poaching.