Kasturi Mrig or Musk deer is the state animal of Uttaranchal. Kasturi Mrig are more primitive than the true deer, in not having antlers or facial glands, in having only a single pair of teats, and in possessing a gall bladder, a caudal gland, a pair of tusk-like teeth and—of particular economic importance to humans—a musk gland.

The musk gland is found only in adult males. It lies in a sac located between the genitals and the umbilicus, and its secretions are most likely used to attract mates.

Musk deers have been hunted for their scent glands which can fetch up to $45,000/kg on the black market.