The color of the pelage ranges from mahogany to black, and white individuals are also known. During winter, the coat becomes darker and shaggier and the spots less prominent, and a mane forms on the back of the males‘ necks.
They are medium-sized herbivores, though they show notable size variation across their several subspecies and considerable sexual dimorphism, with males invariably much larger than females. They can vary from 50 to 110 cm (20 to 43 in) tall at the shoulder and from 95 to 180 cm (37 to 71 in) in head-and-body length. The tail measures about 7.5–13 cm (3.0–5.1 in) long.