Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario

IMG 1894 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Irruption years are great for finding redpolls and other finches.

In birding, an irruption is a large movement of birds from one area to another. Currently, in Southwestern Ontario, we are experiencing an irruption of finches. Finch irruptions occur when there is a poor cone crop to our north resulting in a lack of food. This lack of food can occur for many reasons including disease, parasites, forest fires, and drought. Consequently, huge numbers of finches move south in search of food. Irruptions are cyclical and occur every few years.

IMG 1922 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Common Redpoll feeding on alder catkins.

Common Redpolls are small finches that have irrupted and can be found across our area in large numbers. Redpolls are identified by their heavily streaked bodies, yellow bills with the males having a red crown and pink chest while the females though very similar in appearance lack the pink chest. 

IMG 0397 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
This female Common Redpoll (note the lack of pink chest) was found feeding in a patch of goldenrod.

Finding redpolls can be quite easy by finding their food. Like other finches, repolls are seed eaters and are often found feeding on birch, spruce, pine, or where I typically find them, alder. Redpolls will also consume the seeds of grasses and wildflowers and are regularly found in patches of goldenrod. 

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Huge flocks of Common Redpolls can currently be found in our area.

It’s easy to overlook huge flocks of redpolls as often times they are high overhead in tall trees. Using my ears and listening for their calls helps me find these colorful birds. Due to the fact that redpolls are often so high up photographing them often proves challenging. 

IMG 1970 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Male Common Redpoll with a female in the upper right corner. 

As mentioned previously, I have the greatest success locating redpolls in large patches of alder trees. Alders grow in wet or moist conditions and can be found along riverbanks, ditches, sloughs, floodplain, and other low lying areas.

IMG 3914 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Common Redpolls feeding on Alder catkins.

Alder catkins are tiny cone-like fruit that becomes woody and opens up releasing their seeds (similar to pine or spruce cones). It is these seeds that redpolls can be found feeding on.  So far this winter, everywhere I’ve found alder trees, I’ve found redpolls. 

IMG 1605 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Watching redpolls dangle from alder branches is always enjoyable.

Redpolls will visit backyard feeders and prefer nyjer seed and black-oil or hulled sunflower seed. At a quick glance, redpolls could be confused with a House Finch so be sure to pay close attention if you have finches at your feeder. House Finches are larger and have larger dark bills, with males having more red on their heads than just the red crown of the redpoll. Female House Finches completely lack any red. 

IMG 1989 2 - Irruption Brings Huge Numbers Of Redpolls To Southwestern Ontario
Time is running out to observe redpolls in Southwestern Ontario.

During this irruption year, the chances of finding redpolls are quite good. If you are out and about this winter keep an eye and an ear out for redpolls. Be sure to scan patches of alder trees and fields of goldenrod while listening for their calls. It will likely be a few more years before we experience another irruption and these huge numbers of redpolls again in our area. 

Good birding,
Paul 

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