ALCA.
sideways compressed, upper mandible decurved at tip ; nares partly hidden by feathers ; tarsus shorter than middle toe with claw ; tail 12 feathers ; nest on cliffs; one egg.
Aloes torda I.. RA2012131 LI- Fr. Pingouin macropte.re ; Ger. Tordalk ; 1Grl. Gazza marina ; Swett. Tordmule.
4 ? summer. I lead, throat, foreneck, and upper parts sooty black, a narrow white streak from base of bill to eye ; secondaries tipped white ; beneath white. Bill corrugated, black, with a white transverse curved line. Legs and feet black. Wing. 1S7-198. Tarsus 30-33. Bill 27-3o. In winter the white line from bill to eye disappears, and throat and underparts are white. Young are like winter adults but have no corrugations
on bill.
Faroes, British Isles, Coasts of Scandinavia, Murman Coast, Heligoland, Brittany Coast, and in Baltic on Bornholm, Gothland, and in Gulf of Bothnia ; also Greenland and eastern N. America. In winter, many wander south as far as Moroccan Coast and Canaries and also into Mediterranean, chiefly west, but occasionally to Malta and Adriatic Sea, and on American Coast south to N. United States.