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

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Considered resident in Neotropical portion of range, though irregular local movements occur on large scale throughout; birds ringed as chicks in Santa Fe, NC Argentina, recovered in Rio Grande do Sul, SE Brazil, 1400 km to NE; stragglers to Patagonia and Tierra del Fuego, and at 4300 m in Andes of Bolivia. N populations disperse N after breeding, reaching S Canada, before migrating S to winter in S USA, Mexico and rarely C America. Rare vagrant to Hawaii, though appears less prone to wandering over sea than P. falcinellus. Tends to fly in formations.   (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).