Red-breasted Nuthatch Irruption
As a rule, most Red-breasted Nuthatches winter within their breeding range. Irruptive movements southward typically occur every two to four years when conifer cone production on breeding grounds is poor. This fall’s numbers confirm that it is a banner year for Red-breasted Nuthatches in the Northeast, due to their irruptive flights south.
The large number of Red-breasted Nuthatches at our feeders come as no surprise, as this year’s winter bird forecast by Ron Pittaway predicted a Red-breasted Nuthatch irruption due to the poor spruce seed crops in much of the eastern boreal forest. Even so, the numbers are impressive, as you can see from Ken Kaufmann’s (Audubon’s Field Editor) comparison of eBird’s September 2017 and September 2018 Red-breasted Nuthatch sightings.
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