The Topi (Damaliscus lunatus), also known as the Tsessebe, Tiang or Korrigum, is an antelope found in Sudan, Chad, Kenya, Tanzania, and South Africa. It lives in savannah and floodplain where it eats mainly grasses. Topi can reach over forty miles per hour when frightened and will sometimes jump over each other to get away from a threat. They have the reputation of being the fastest of all antelopes.

Topi stand over 40 inches tall at the shoulder and weigh 185 to 365 pounds. Their coats are a rusty red color with black legs, chest and a black strip running from forehead to the tip of the nose. The horns are lyre-shaped and are conspicuously ringed and can reach 27.55 inches in both sexes. The horns of older animals tend to wear down, and this can be used as a means of assessing the age of individuals in the field.

Males keep territories up to 6500 square feet and marked out with urine and dung. During the rutting season, some males defend leks, and females preferentially mate the with holder of the central leks. Females generally live in loose herds of up to twenty females and calves. However, thousands of Topi may migrate together. Males will engage in fights for territory or at the lekking grounds, and these are fought by lunging on to their knees while whacking each other with their horns. Fights between males and females may also be seen.