Differ sharply from other deer. Long well-muscled hind legs; shorter, weaker, thin forelimbs; chest usually small; back highly arched back, so that the animal is much higher at the sacrum than at the shoulders. This body structure correlates with the animal's usual pattern of movement, a series of well coordinated jumps generated from the hind legs. Males weigh slightly less than females. Neither sex has antlers. The male has fine and extremely sharp canines protruding directly downward from the mouth. In older males, canine tips extend considerably below the lower jaw.
Age-related changes in hair coat and colorings: new-borns have short, dark brown, soft hair, densely covered with yellowish or white spots. By the second winter, young molt into their winter coat, which consists of coarse hair typical of an adult. The spots become less defined or absent.
Range mass: 15 to 17 kg.