152. Clangula islandica. 20 in.

Head bluish with a white crescent at base of bill; aye bright yellow in both this and the last species; female practically indistinguishable from the preceding, although the bill of the present species is shorter and comparatively higher at the base.

Range. - Breeds from Northern U. S. north to Labrador and Alaska, and in the Rockies, south to Colorado; winters in the northern half of the U. S.