Two nights of big migration brings in the last big push of diversity of warblers

Yellow rumped Warbler 'myrtle', Belchertown, MA, Oct 4, 2026

Northern Parula, Belchertown, MA, Oct 4, 2026

Blackpoll Warbler, Belchertown, MA, Oct 4, 2026

Ovenbird, Belchertown, MA, Oct 4, 2026

Common Yellowthroat, Rail Trail, Ware, MA, Oct 4, 2026

Yellow rumped Warbler 'myrtle', Rail Trail, Ware, MA, Oct 4, 2026

Tennessee Warbler, Arcadia, Northampton, MA, Oct 3, 2026

Common Yellowthroat, Arcadia, Northampton, MA, Oct 3, 2026

Yellow rumped Warbler 'myrtle', Arcadia, Northampton, MA, Oct 3, 2026

Blackpoll Warbler, Arcadia, Northampton, MA, Oct 3, 2026

Magnolia Warbler, Arcadia, Northampton, MA, Oct 3, 2026

Palm Warbler 'yellow', Arcadia, Northampton, MA, Oct 3, 2026

Tennessee Warbler, Arcadia, Northampton, MA, Oct 3, 2026

Blackpoll Warbler, Belchertown, MA, Oct 3, 2026

Black throated Green Warbler, Belchertown, MA, Oct 3, 2026

Nashville Warbler, Belchertown, MA, Oct 3, 2026

Northern Parula, Belchertown, MA, Oct 3, 2026

Cape May Warbler, Belchertown, MA, Oct 3, 2026

After two very warm days to start October the conditions cooled a bit thanks to a cold front and with it two nights of heavy migration (millions of individuals per birdcast).  Yesterday was fantastic for the first few hours of the morning before the breeze picked up.  I spent over three hours at Arcadia before heading back toward home.  Arcadia produced seven species of warblers with above typical counts for Tennessee Warbler, Common Yellowthroat and Magnolia Warbler plus a noticeable uptick in Yellow rumped Warblers.  A stop in Belchertown produced more species including a slightly late Cape May Warbler.  I ended the morning with a lucky 13 species of warbler of a bright and sunny day.  Today was not nearly as sunny with overcast conditions and some morning fog.  I debated on where to go and decided on starting my morning in Ware and a couple stops there produced just four species (with Yellow rumped Warbler being the most common).  I then headed back to Belchertown and added more species including a slightly late Ovenbird and three Northern Parula.  The only species still singing the last couple days have been Pine Warbler and at least one Northern Parula.  Diversity of warblers will continue to dwindle as October wears on.