The Nile lechwe, wasserbock or Mrs Gray's lechwe or waterbuck (Kobus megaceros) is a species of antelope in the genus Kobus in the family Bovidae. It was first described by Leopold Fitzinger in 1855. Nile lechwe stand 90–100 cm (35–39 in) at the shoulder and weigh from 70–80 kg (150–180 lb).Nile lechwe are a herbivores, feeding on foliage, grasses, fruits, and twigs. They are gregarious, and form large, loose herds.