BLACK-POLLED WARBLER 405 



I have not been able to find any record of a case of parasitism of 

 the blackpoll by the cowbird. This, however, is to be expected as the 

 ranges of the two birds do not greatly overlap. The cowbird is of 

 no importance in its relation to the life of this warbler. 



DISTKIBUnON 



Range. — North America and northern South America. 



Breeding range. — The black-polled warbler breeds north to northern 

 Alaska (Kobiik River and Fort Yukon) ; northern Yukon (La Pierre 

 House) ; northern Mackenzie (Richards Island, Fort Anderson, Black- 

 water River, and Hanbury River) ; northern Manitoba (Lac du 

 Brochet and Churchill) ; northern Quebec (Bush Lake, Fort Chimo, 

 and Indian House Lake) ; and northern Labrador (Nain) . East to 

 the coast of Labrador (Xain, Cape Aillik, and Cartwright) and New- 

 foundland (Fogo Island, Trinity, and St. John's) . South to southern 

 Newfoundland (St. John's and St. Pierre) ; Nova Scotia (Baddeck, 

 Halifax, and Yarmouth) ; southern Maine (Calais, Waterville, and 

 Auburn) ; southern New Hampshire (Tamworth and Peterborough) ; 

 northwestern Massachusetts (Mount Grey lock) ; northern New York 

 (Mount Marcy and Leyden, rarely Slide Mountain in the Catskills) ; 

 northern Ontario (Trout Lake) ; central Manitoba (Oxford House) ; 

 central Saskatchewan (Cumberland House and Flotten Lake) ; cen- 

 tral Alberta (Flat Lake, Stony Plain, and Hythe) ; and central and 

 northwestern British Columbia (Summit Lake, Tatana Lake, and 

 Atlin) ; southern Yukon (Carcross) and southern Alaska (Chitina 

 Maraine, Lake Clark, and Nushagak). West to western Alaska 

 (Nushagak, Bethel, St. Michael, Nome, and Kobuk River). 



'Winter range. — The blackpoll winters in northern South America 

 east to eastern Cayenne (Oyapock River). South to southern 

 Cayenne (Oyapock River) ; western British Guiana (Roraima) ; south- 

 ern Venezuela (Casiquiare) ; northwestern Brazil (Marabitanas) ; and 

 north-central Ecuador (Sara-yacu). West to north-central Ecuador 

 (Sara-yacu and Archidona) and western Columbia (La Morelia, 

 Rio Frio, and the Santa Marta region). 



Migration. — Late elate of spring departure from the winter home is ; 

 Ecuador — Rio Suno, April 10. Early dates of spring arrival are; 

 Cuba — Habana, April 24. Bahamas — Cay Lobos, April 15. Florida — 

 Sombrero Key, April 14. Alabama — Barachias, April 22. Georgia — 

 Milledgeville, April 11. South Carolina — Aiken, April 20. North 

 Carolina — Raleigh, April 16, Virginia — Lynchburg, April 18. West 

 Virginia — Wheeling, April 31. District of Columbia — Washington, 

 April 21. Pennsylvania — Jefferson ville. May 4. New York — Brook- 

 lyn, May 1. Massachusetts — Quincy, May 7. New Hampshire — East 

 Westmoreland, ISIay 2. Maine — Portland, May 7. Nova Scottia — 



981873—53 27 



