On December 26th our teams for the Eastport area CBC tallied 30 pine warblers. A whopping 23 of them were seen on Deer Island, NB; six in Eastport, ME; and one on Campobello Island, NB. I saw two this week in Eastport at the same spot as our CBC count, which makes me think that they've stuck around.
Louis and I traded emails about Eastport's CBC results, and he offered that this type of pattern can foreshadow an expansion of range for bird species. His comment reminded me of years back when Derek and Bill were recording pulses of red-bellied woodpecker sightings in Maine, and now that species has settled in year-round throughout the lower half of the state.
I just did a quick (and likely imprecise) count of pine warblers reported on eBird for Maine, New Brunswick and Nova Scotia during January and February of 2017 (23), 2018 (6), 2019 (8), and 2020 (76 so far). As you can see, there are more than double the reports of pine warblers this winter than for the past three winters combined. I only used the highest count for one location regardless of the number of submissions.
I'm curious if there have been influxes of pine warblers like this during other winters in Maine and the Maritimes? Thanks for any thoughts that you'd like to offer. Feel free to respond offline.
Cheers,
Chris Bartlett, Eastport
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