Both sexes have long curved horns. Muskoxen are usually around 2.5 m (8.2 ft) long and 1.4 m (4.6) high at the shoulder. Adults usually weigh at least 200 kg (440 lb) and can exceed 400 kg (880 lb). Their coat, a mix of black, gray, and brown, includes long guard hairs that reach almost to the ground. Rare "white muskox" have been spotted in the Queen Maud Gulf Migratory Bird Sanctuary[1] Muskox wool, or qiviut (an Inuit word), is highly prized for its softness, length, and insulative value. Prices for yarn ranges between $50 an $100 per ounce.
During the summer, muskoxen live in wet areas, such as river valleys, moving to higher elevations in the winter to avoid deep snow. They graze on grasses, reeds, sedges, and other ground plants, digging through snow in the winter to reach their food.
Muskoxen are social and live in herds, usually of around 10–20 animals, but sometimes over 400. Winter herds consist of adults of both sexes as well as young animals. During the mating season, which peaks in mid-August, males compete for dominance, and one dominant bull drives other adult males out of the group. Non-breeding males will often form male only herds of 3-10 or wander the tundra alone. During this period all males are extremely aggressive. Bulls will even charge birds if they are close by.