Sunday, September 5, 2010
Bay-breasted Warbler numbers fluctuate with outbreaks of spruce budworms in the north woods. The spraying of Canadian forests for budworms have hurt Bay-breasted Warbler populations. Bay-breasted Warbler migrate across eastern North America. They continue to northern South America across the Gulf of Mexico. Blackpoll Warblers, on the other hand, migrate across the western Atlantic Ocean. Consequently, Bay-breasted Warblers are less often observed in the southeast United States (Williams 1996).
Posted by Dan Tallman at 9:02 AM