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
Wildebeest 1800s. In the early 20th century, one species of the wildebeest, "C. albojubatus", was identified in eastern Africa. In 1914, two separate races of the wildebeest were introduced, namely "Gorgon a. albojubatus" ("Athi white-bearded wildebeest") and "G. a. mearnsi" ("Loita white-bearded wildebeest"). However, in 1939, the two were once again merged into a single race, "Connochaetes taurinus albojubatus". In the mid-20th century, two separate forms were recognised, "Gorgon taurinus hecki" and "G. t. albojubatus". Finally, two distinct types of wildebeest – the blue and black wildebeest – were identified. The blue wildebeest was at first placed under a separate genus,