Bird of the Week, October 25, 2010
Bay-breasted Warbler

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The Bay-breasted Warbler breeds in the boreal coniferous forests of central and eastern Canada through New England, and winters in Central America and northern South America. Its populations rise and fall dramatically with outbreaks of its main food source, spruce budworm. Population declines are a result of changes in forestry practices, habitat loss on its wintering grounds, and possibly the use of insecticides to control budworm.


Bay-breasted Warbler; Ted Ardley, Range Maps of North America;Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

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