Western Lowland Gorilla
Western lowland gorillas are herbivores, eating mostly leaves but also fruit, nuts and termites. Active during the day, they forage in the morning, nap during the heat of the day, and forage again until evening, when they make a nest of leaves to sleep on. These gorillas are completely black, except for mature males, which grow silver hair along their heads and shoulders, earning them the name "silverback." They are very social animals; groups usually consist of about five, and while they don't defend their territory, they usually steer clear of each another. Scientists estimate their numbers in the wild to be between 90,000 and 110,000, and they are considered critically endangered, in part due to bush meat hunters.