Eastern gorilla
The eastern gorilla ("Gorilla beringei") is a critically endangered species of the genus "Gorilla" and the largest living primate. At present, the species is subdivided into two subspecies. Grauer's gorilla, formerly known as the eastern lowland gorilla ("G. b. graueri") is more populous, at about 3,800 individuals. The mountain gorilla ("G. b. beringei") has only about 1000 individuals. The International Union for the Conservation of Nature mentioned illegal hunting in its assessment of threats to the species.
Okavango Delta
The most populous large mammal is the lechwe antelope, with more than 60,000. It is a bit larger than an impala with elongated hooves and a water-repellent substance on their legs that enables rapid movement through knee-deep water. They graze on aquatic plants, and like the waterbuck, take to water when threatened by predators. Only the males have horns.