Winter Birds Gather
Winter Birds Gather
71/72: Dec 22 to 26
Winter birds gather at feeders—varied thrush, juncos, chickadees. More species now than summer's abundance.
風物詩 · Fūbutsushi
A varied thrush foraging beneath a feeder in late December — orange-and-black plumage bright against the wet leaf litter, a mountain bird taking refuge in the lowland winter.
物の哀れ · Mono no Aware
The varied thrush will leave in March when the mountains open again, and the juncos will follow in April. The backyard will be quieter then, and greener, but it will miss them.
What the season brings?
Late December brings peak winter bird diversity to Pacific Northwest backyards and forests, with the region paradoxically hosting more bird species in winter than summer. Varied thrush descend from mountain breeding grounds to lowland parks and gardens, their distinctive orange-and-black plumage brightening gray winter days as they forage through leaf litter with characteristic backward-hopping movements. Dark-eyed juncos (Oregon variety with dark hoods and rufous sides) arrive in flocks, joining year-round residents like chestnut-backed chickadees, Pacific wrens, and song sparrows. Winter storms and cold weather concentrate birds at feeders, creating exceptional viewing opportunities. The Pacific Northwest serves as a winter refuge for northern-breeding raptors and waterbirds seeking milder conditions, while resident species remain active throughout the season. Varied thrush switch from summer insects to winter berries and seeds, often visiting ground feeders and foraging in areas where fruit-bearing shrubs provide abundant food. This period marks the full establishment of winter bird communities that will remain through February.
Convergence chain
Triggered by
Cold snaps north of the border drive irruptive migrants (varied thrushes, Bohemian waxwings, pine siskins, crossbills) south into the PNW lowlands; combined with resident bird flocking behavior that peaks when days are shortest and foraging time is most limited
Enables
Winter flocks increase foraging efficiency through collective predator vigilance; irruptive species from Canada carry information about northern seed and berry crop failures; Project FeederWatch observations of winter birds generate continent-scale phenological data; mixed flocks at feeders represent the northernmost extent of irruptive species' winter range
The cascade
Cold Canadian air pushes irruptive species south → Bohemian waxwings arrive in cedar-tree flocks → varied thrushes compete with robins for holly and hawthorn berries → pine siskins descend on alder cone clusters → irruptive species mix with resident birds, creating mixed flocks → mixed flocks forage more efficiently with more eyes scanning for Cooper's hawks → Cooper's hawks follow the mixed flocks across neighborhoods → the winter bird community is a living readout of forest conditions hundreds of miles to the north
Foods to Mark the Season
Holiday feasts feature Pacific Northwest abundance—roasted root vegetables (carrots, parsnips, rutabagas), hearty cruciferous vegetables (Brussels sprouts, cabbage), and stored winter squash. Christmas markets offer mulled wine, raclette, and regional specialties celebrating the season.
Things to Do
Participate in the Christmas Bird Count (Dec 14 - Jan 5), North America's longest-running citizen science project, counting winter birds across the Pacific Northwest. Set up backyard feeders with black oil sunflower seeds to attract diverse winter species including varied thrush, juncos, and chickadees during peak gathering season.
Frequently Asked Questions
Visions of the Season

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Each microseason is approximately 5 days, marking the subtle changes in nature throughout the year.