The mountain gorilla is a subspecies of gorilla that resides in the tall mountains of Central Africa. There are two populations - one based in the Virunga volcanic mountains of Central Africa, and the other in Uganda's Bwindi Impenetrable National Park. The forests that they live in are very highly elevated at anywhere in between 8,000 to 13,000 feet. Compared to other great apes, they have much thicker fur, and a lot more of it; this helps them to survive and stay warm in temperatures that often drop below freezing. However, humans have moved and are continuing to move further into the mountain gorilla's territory, which is forcing them to move into the mountains for longer periods and endure very deadly conditions.