The nyala is found in the eastern part of South Africa, in riverside thickets and dense brush and fringe forests. It is never far from water. Male nyala are far larger than females with distinctly dimorphic color. Spiral horns (male only) twist backwards in the plane of the face, with unpigmented tips. There is a crest of longish hair down the back of the neck, clear along the back, exaggerated in males, which also have shaggy hair down the throat and under the belly.