Have you noticed the birds looking more “fluffy” lately? One way birds keep warm on frigid winter days like this one is piloerection, an involuntary fluffing of feathers caused by tiny muscles in the skin contracting to raise feathers. When the feathers fluff, air is trapped within the plumage and provides insulation against cold. Feathers can also be lifted by the same mechanism to provide cooling in hot temperatures, making piloerection a critical and versatile thermoregulatory tool. If you have any photos of “fluffy” birds this winter, we would love to see them - read more below.
A local Mourning Dove "fluffing up" to keep warm. Photo: Amanda Robinson
More in local bird and nature news:
It’s Officially Borb Season: Now we know birds fluff up their feathers via piloerection to trap insulating air, and we know we have certified borbs: fluffy, delightfully adorable puffed-up birds. Right now, our region is home to world-class borbs. Spot a borb this week? Tag us on social media @nvbirdalliance!
Some eye candy for frigid winter days:Cornell Lab’s Best Bird Photos 2026 presents some of the most incredible photos collected in their Macaulay Library last year. It’s all but guaranteed to make you smile, even in the cold - and make sure you get all the way down to the snowbirds section!
We need your help:Check out our volunteer page for all the different ways you can lend a hand! From pulling invasives to helping with tabling events and counting birds and insects, there’s something for everyone.
Stay warm and see you out there,
The Northern Virginia Bird Alliance Team
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