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Irruption Alert: Pine Siskins Are On The Move

by Ryan F. Mandelbaum

After Tyler Hoar’s promising first Winter Finch Forecast, Pine Siskins have already started to push southward across the Eastern United States. While August had few reports of the bird outside of boreal and pine forest areas, Siskins have now been reported attending to cones and feeders across the West, Midwest, New England, and even into the south of Louisiana, Texas, and coastal North Carolina. 

Below, you can see a comparison between Pine Siskin reports in August and September, demonstrating the recent movement:

August 2020
September 2020

Pine Siskins are the ultimate generalist of finches, feeling at home in both boreal and montane habitats where they feed on conifers, grasses, as well as deciduous trees like alder and birch. Though some of the birds undertake a regular migration, many will also irrupt southward or eastward approximately every second year in response to bad conifer crops in the core of their range. However, Pine Siskin movement is erratic, and the birds might occur at unexpected times and in unexpected places.

This year, Hoar predicted that many Siskins would remain in western Canada due to strong spruce crops, but that those remaining in the eastern forest would likely move southward in search of a meal. Indeed, this movement has started and exceeded our expectations, both in the East, and in the West, where a massive movement of Siskins was recently reported on Vancouver Island. These buzzy, streaked finches use their pointed bill to eat small seeds, and prefer nyjer at a feeder. If you’re lucky enough to encounter Pine Siskins on your hikes or at your feeder, please consider filling out a report on eBird.

FiRN is committed to researching and protecting these birds and other threatened finch species. We’ve included a link to donate below, and hope you’ll help support our efforts.

7 replies on “Irruption Alert: Pine Siskins Are On The Move”

That’s a fairly large flock of Siskins. Here in central NY I’m getting several small flocks of Pine Siskins. Where did you have this big flock? Thanks for commenting.

Hi!

Beginning the last week of October, we experienced a large number of pine Siskins in our yard. The last time I saw this was after superstorm Sandy. There must have been 40-50 at my feeders at a time. I even had them eating seed from my hands. It was awesome! We haven’t seen but a couple in the past couple of days. Have they moved on?

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