The African antelope with thick horns is known as the TOPI. It is a species of antelope found in East Africa, and is the most common large herbivore in the savannas of East Africa. The TOPI has a reddish-brown coat with white patches on its face, neck, and legs. Its horns are thick and curved, and can reach up to 30 inches in length. The TOPI is an important prey species for predators such as lions, leopards, and hyenas.