The Icelandic is the Icelandic breed of domestic sheep. It belongs to the Northern European Short-tailed group of sheep, and is larger than most breeds in that group. It is thought to have been introduced to Iceland by Vikings in the late ninth or early tenth century.
It is generally short-legged and stocky, slender and light-boned, and usually horned, although polled and polycerate animals can occur; there is a polled strain, the Kleifa. The fleece is double-coated and may be white or a variety of other colors; the face and legs are without wool. The sheep are highly resistant to cold, and are generally left unshorn for the winter. Icelandic ewes are highly prolific, with a lambing percentage of 175–220%. The Þoka (Thoka) gene is carried by some ewes, which may give birth to large litters of lambs. A unique strain within the population is the Leadersheep, which carries a hereditary ability or predisposition to lead other sheep safely over dangerous ground.
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