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

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Migratory; winters Atlantic and Pacific coasts of North America as far as Baja California, most of Europe S to Mediterranean, Black and Caspian Seas and NE Asia S to Japan and E China; also inland (e.g. Great Lakes, Central Europe). Irregularly further S.   (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).