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

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Long distance migrant. During late Aug, much of population gathers along S Hudson Bay and James Bay and at certain sites in Saskatchewan and Alberta; crosses W Atlantic and arrives at unknown locations in N South America and stages at Amazon basin, then possibly passes through W Brazil on way to S Argentina; apparently young depart after adults. Birds wintering around Chiloè I may originate from Alaska, and follow different route. N migration probably very rapid, using few or no staging sites in South America; passage through USA more westerly, with many birds crossing Great Plains, Apr-May; rarely on Pacific coast of Guatemala and Costa Rica. Many wintering sites are Tierra del Fuego and areas around Chiloé I in SC Chile.   (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).