Atorda

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Alca torda	Linnaeus, 1758
Synonym:
Family:	Alcidae
Order:	Charadriiformes
English:	Razorbill
French:	Petit Pingouin
Spanish:	Alca común
German:	Tordalk (There's a German version of this page!)
Norwegian:	Alke (There's a Norwegian version of this page!)
Migration:	intercontinental
Regions:	Europe, North Africa, North America, North Asia, South & Southeast Asia

digitized by GROMS, after del Hoyo J & Elliott A & Sargatal J (eds.) (1996), [...]
Copyright: GROMS/BƒN - www.groms.de

“Winters mostly offshore at sea, in W Atlantic off E Newfoundland as far as Flemish Cap (c. 700 km offshore), off Nova Scotia S regularly to North Carolina, and common on Georges Bank off New England. In E Atlantic, movements outside breeding season roughly similar to those of Uria aalge, but extends farther S. Overall, N populations move S or SW: Greenland and Labrador birds to offshore E Newfoundland and SW to Gulf of Maine and farther S, those from Barents and White Seas to Skagerrak, like Baltic breeders. N British birds first move to SW Norway and North Sea (young birds later to Bay of Biscay), whereas those from Irish Sea move S to Bay of Biscay and W Mediterranean. Most birds return to colonies from mid-Apr to early May in W Atlantic, except where ice persists longer (e.g. Labrador), and between early Mar and mid-Apr in E Atlantic, though some colonies are reoccupied by late Feb or earlier. Dispersal patterns complex, requiring further study of birds at sea outside breeding season on both sides of Atlantic.”
del Hoyo J & Elliott A & Sargatal J (eds.) (1996), Handbook of the birds of the world. Vol. 3: Hoatzin to Auks, p. 711

Further detailed information from the GROMS-database