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

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Migratory, with elliptical migration pattern. Adults leave breeding grounds from early Aug, juveniles from mid- Aug; migrate across Canada to Hudson and James Bays, then SE, crossing W Atlantic to Lesser Antilles and N South America, and thence S, arriving in Argentina early Sept; regularly some birds S to region of Tierra del Fuego. May migrate without pause from James Bay to South America, if weather permits. During 19th century, may have followed route further E, as large numbers formerly used Nova Scotia as staging area. Return migration starts early Feb in Argentina, and follows route across interior South America, over Central America, across Gulf of Mexico and up Mississippi flyway; pauses on prairies of Texas in second half Mar, and on prairies of Canada in May, reoccupying Canadian breeding grounds late May to mid-Jun.   (del Hoyo J, Elliott A, Sargatal J (eds), 1996)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1996) - 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).