Human activities such as mineral exploration, road construction and aircraft noise, disturb populations of Dall’s sheep. Wild sheep face a precarious future because they are adapted to habitats that are becoming increasingly fragmented.
The horns of male Dall’s sheep grow in the spring, summer and early fall, but stop growing during the winter. This creates growth rings, like on a tree, that can be used to determine their age.
Dall’s sheep usually settle dominance without fighting, but if two males have similar horn size, they will battle it out in a thunderous fight. They stand 10 to 12 metres apart and then rush together, crashing heads. The crashes can be heard up to a kilometre away, but nobody gets hurt and they usually settle things after a few bouts.
Female Dall’s sheep, called ewes, live in flocks with other ewes, lambs and immature males. Lambs play together and sometimes form nursery groups where one or two moms watch over a group of lambs, giving the other moms a break and a chance to eat.
Babies are called lambs.
At a Glance
45 – 113 kg (101 – 249 lb)
1.3 – 1.8 (4.3 – 5.9 ft)
Arctic, subarctic, high mountain ranges of Canada and the United States
Herbivore. Dall’s sheep graze on grasses and lichens, a type of fungus. They eat between 50 and 120 species of plants.