The wildebeest, also called the gnu, is an antelope of the genus Connochaetes. It is a hooved mammal.

Wildebeest grow to 1.15–1.4 metres (3 ft 9 in–4 ft 7 in) at the shoulder and weigh 150–250 kilograms (330–550 pounds). They inhabit the plains and open woodlands of Africa, especially the Serengeti. Wildebeest can live more than 20 years if they are not snatched by crocodiles, lions or illness.