Elands, Gnus, Rheboks, and Kudus are all large African antelopes. Elands are the largest species of antelope, with males weighing up to 900 kg. Gnus are also known as wildebeests and are a common sight in the Serengeti. Rheboks are a species of antelope found in South Africa and Namibia, and are known for their distinctive white markings. Kudus are a species of antelope found in East and Southern Africa, and are known for their long, spiraling horns. All four of these species are large African antelopes that play an important role in the African ecosystem.