Black wildebeest the hybrid as compared to either of its parents. In some animals, the auditory bullae are highly deformed, and in others, the radius and ulna are fused. Black wildebeest are sexually dimorphic, with females being smaller in size and more slender than males. The head-and-body length is typically between . Males reach about at the shoulder, while females reach . Males typically weigh and females . A distinguishing feature in both sexes is the tail, which is long and similar to that of a horse. Its bright-white colour gives this animal the vernacular name of "white-tailed gnu", and also distinguishes
Blue wildebeest Nature rates the blue wildebeest as being of least concern. However, the numbers of the eastern white-bearded wildebeest ("C. t. albojubatus") have seen a steep decline to a current level of probably 6,000 to 8,000 animals, and this is causing some concern. As one of the major herbivores of southern and eastern Africa, the blue wildebeest plays an important role in the ecosystem, and is a main prey item for large predators such as the lion. It is one of the animals that draws tourists to the area to observe big game, and as such, it is of major economic