Belgium,Bulgaria,Canada,Cape Verde,Czech Republic,Denmark,Estonia,Finland,France,Germany, Gibraltar,Greenland,Iceland,Ireland,Japan,Latvia,Lithuania,Mauritania,Mexico,Netherlands, North Korea,Norway,Poland,Portugal,Romania,Russia,Spain,Sweden,Switzerland,United Kingdom, United States - Alaska,United States - mainland,Western Sahara,
IOC 9.1 Subspecies
e Canada to Iceland, Scotland, s Norway and the Baltic Sea
n Norway to Svalbard and nw Russia
British Isles to w Iberian Pen.
e Korean Pen., Japan through the Bering Sea to w Alaska and sw Canada