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

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A partial migrant to Central America and the West Indies, with sporadic records of birds wintering almost throughout the breeding range. A summer visitor to Alaska, but a few regularly winter along the coasts of Unalanaska and Shumagin Isalnds (Aleutians and Alaska Peninsula); some winter also on the coasts and in the interior of British Columbia, South Newfoundland, Nova Scotia, and Washington State. The main wintering grounds are the southern half of USA, Central America south to Panama, and the West Indies south to Trinidad. Although there are no breeding records in the Bahamas, a few birds regularly oversummer on New Providence and other islands there. Non-breeding migrants visit the West Indies-Guatemala and Panama from September to early April, and Trinidad from mid October to late April. In autumn migrants coast south along the shores of Lake Michigan at a peak rate of 12 per hour, and conversely in spring they move north on the west shore of Lake Huron at a rate of up to 15 birds per hour (Salyer and Lagler 1946). Migrants are common along the Atlantic seaboard.   (Fry CH, Fry K, Harris A, 1992)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (2001) - 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).