Imposing Head on Mount of an Wildebeest also known as the gnu, the wildebeest is a member of the antelope family. They have a large, box-like head with curving horns. The front end of their body is heavily built, while the hindquarters are slender with spindly legs. They have a gray coat and a black mane as well as a beard that can be black or white. There are several races of wildebeest. The species forming the large herds of the Serengeti-Mara ecosystem of Kenya and Tanzania is known as the western white-bearded wildebeest, while the eastern white-bearded races inhabit Kenya and Tanzania east of the Gregory Rift. The brindled, or blue, race occurs south of the Zambezi River.