The Arctic regions both in summer and winter form the home of this large and handsome species, though many wander southwards during the winter months.

In the Shetlands and Orkneys it is a fairly regular winter visitor during severe weather, and it has frequently occurred in Scotland; to England and Ireland, however, its visits are few and far between.

The plumage is pure white, spotted and barred with dark brown, the amount of which varies greatly in individuals. Length of male 22 in.; wing 15·5 in. The female is slightly larger.