Species fact sheet by Global Register of Migratory Species - www.groms.de

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Migratory; winters along Pacific coast of North America from Alaska to Mexico and across S USA to Atlantic seaboard N to New England. Occasionally further S; has occurred Greenland, NE Siberia, Hawaii and Japan; also NW Europe (mainly Britain).   (del Hoyo J, Elliott A, Sargatal J (eds), 1992)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1992) - www.hbw.com,
• Copyright: GROMS/BfN - www.groms.de
  
  (A digitised version of this map is published in GIS shape format on the GROMS CD).