Animal Database

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Animal Database
Animal Database
Dall Sheep
Dall Sheep
Common Name Dall's sheep, thinhorn sheep
Range Dry mountainous regions and select sub-alpine grass and low shrub terrains; Arctic, Subarctic: most of Alaska, the Yukon Territory, extreme northwest and north-central British Columbia.
Scientific Classification
Kingdom Animalia
Phylum Chordata
Class Mammalia
Order Artiodactyla
Family Bovidae


Genus Ovis
Species O. dalli
Conservation Status
Least Concern

The Dall sheep, also known as the thinhorn sheep, (Ovis dalli) is a species of wild sheep native to northwestern North America, ranging from white to slate brown in colour and having curved, yellowish-brown horns. The two subspecies are the nominate Dall sheep or Dall's sheep and the more southern subspecies, Stone sheep (also spelled Stone's sheep) (O. d. stonei), which is a slate brown with some white patches on the rump and inside the hind legs.


Dall sheep stand about three feet high at the shoulder. They are off-white in color, and their coat consists of a fine wool undercoat and stiff, long, and hollow guard hairs. Their winter coats can be over two inches thick.



Dall sheep eat grasses, sedges, broad-leaved plants, and dwarf willows. In winter, when these foods are scarce, the sheep add lichens to their diet. The distribution and availability of forage requires the sheep to move seasonally between traditional summer and winter ranges.


Dall's sheep can survive up to 10 years in the wild.



  • Their horns take up to 8 years to grow and are composed of keratin, the same material as our fingernails.