Dall Sheep (Ovis dalli dalli) inhabit the mountain ranges of Alaska. These white creatures are most notable for the males’ massive curled horns. Females (known as ewes) also carry horns, but theirs are shorter and more slender, and only slightly curved. Until rams reach the age of 3 years, they tend to resemble the ewes quite a bit. After that, continued horn growth makes the males easily recognizable. Horns grow steadily during spring, summer, and early fall. In late fall or winter, horn growth slows and eventually ceases. This start-and-stop growth results in a pattern of rings called annuli which are spaced along the length of the horn, and can help determine age. Dall rams as old as 16 years have been seen, and ewes have been known to reach 19 years of age. Generally, however, a 12 year old sheep is considered quite old.
Up to 300 pounds
Alpine areas in the subarctic mountain ranges of Alaska.
Herbivorous; sheep eat grasses, sedges, lichen, moss, and other plants.
Wolves, coyotes, golden eagles, wolverine, and brown bears.
Ewes bear a single lamb.
Dall sheep are known for their massive, curled horns and the clashes that occur among the males.