Mountain Chickadee

The Mountain Chickadee (Poecile gambeli) is a small, hardy songbird native to the montane coniferous forests of Western North America. Active, curious, and incredibly agile, this bird is a staple of high-altitude ecosystems, often seen clinging upside down to evergreen cones and pine needles. In winter, they form loose mixed-species foraging flocks and are common visitors to backyard bird feeders in mountain towns. Like other chickadees, they are food-caching specialists, storing thousands of seeds each autumn to sustain themselves through freezing winters.

• Field Marks: The most distinctive feature is a sharp white line (eyebrow or supercilium) cutting directly through the otherwise solid black cap. It has a black throat bib, white cheeks, a soft gray back, and pale gray underparts with buffy-gray flanks.
• Size & Shape: Small and plump with a short, stout bill, a round head, and a relatively long, narrow tail.
• Similar Species: Easily distinguished from the Black-capped Chickadee by the white eyebrow stripe and overall grayer plumage. It lacks the rich, chestnut-colored back and flanks of the Chestnut-backed Chickadee and does not overlap widely in range with the Boreal Chickadee, which has a brown cap.

• Habitat: Breeds in dry montane coniferous forests, particularly those dominated by Ponderosa pine, lodgepole pine, Douglas-fir, spruce, and subalpine fir. They also inhabit mixed coniferous-deciduous forests containing aspen.
• Geographic Range: Resident across the western mountains of North America, extending from northern British Columbia and Alberta down through the Rocky Mountains, Cascades, and Sierra Nevada to northern Baja California.
• Migration: Mostly non-migratory. Instead of migrating south, they undergo altitudinal migration, moving down into lower valleys, woodlands, and riparian corridors during severe winter weather.

• Diet & Foraging: Extremely active foragers. In summer, they eat primarily insects, caterpillars, and spiders plucked from bark and needles. In winter, they shift to conifer seeds and berries. They regularly cache seeds in crevices of tree bark, utilizing a highly developed spatial memory to relocate them months later.
• Voice: Their song is a clear, whistled fee-bee-bay or fee-bee-fee-bee, which is lazier and more whistled than other chickadees. The common call is a harsh, raspy chick-a-dee-dee-dee, typically sounding scratchier and more nasal than that of the Black-capped Chickadee.
• Nesting: They are secondary cavity nesters, utilizing abandoned woodpecker holes, natural tree cavities, or artificial nest boxes. The female builds a cup-shaped nest primarily of moss, plant fibers, and animal fur.