: to mid May-early June with from early May and to late Jun, and to , occasionally , mi dAug to early/mid Oct, with a peak mid/late Sep and from early Aug to early Nov. Most often encountered in deciduous and mixed forests and places where migrants concentrate.
Miscellany: Formerly a breeder on spruce-covered and a few eastern MDI shore points. No confirmed breeding records in more than 50 years.
Part of Blackpoll's fall migratory path is over the Atlantic Ocean from the northeastern United States to northern South America, a route that averages more than 1800 miles over water and requires potentially nonstop flights taking more than three days. To fuel this flight, Blackpolls add fat, nearly doubling their body mass.
For more information on this remarkable bird, see here.
Last Reviewed: May 20th, 2026