Mountain Chickadee

The Mountain Chickadee is a hardy, active small songbird of western coniferous forests, closely resembling the more widespread Black-capped Chickadee but readily told apart by a crisp white stripe over each eye that cuts through the black cap. The body is soft gray above and paler gray-white below, with the same cheerful, energetic chickadee demeanor familiar from its relatives.

This species is a year-round resident through much of its range, well adapted to cold montane winters, and like other chickadees it caches food and possesses excellent spatial memory to relocate thousands of hidden seed caches months later.

Key Field Marks

• Black cap broken by a bold white eyebrow stripe — the key diagnostic mark
• Black bib/throat patch
• White cheek patch
• Gray back, wings, and tail; pale gray-white underparts

Similar Species

• Black-capped Chickadee: lacks the white eyebrow stripe, showing a solid black cap down to the eye.
• Chestnut-backed Chickadee: has a chestnut-brown back and flanks, quite different from the Mountain Chickadee's plain gray.
• Boreal Chickadee: has a brown (not black) cap and brownish flanks, without a white eyebrow.

Habitat

Mountain Chickadees inhabit open coniferous and mixed forests in mountainous terrain, especially ponderosa pine, fir, and spruce stands, and readily visit backyard feeders in mountain communities.

Range

The species ranges through the mountains of the western United States and southwestern Canada, from the Rockies and Cascades south through the Sierra Nevada and interior ranges of the Great Basin and Southwest.

Migration

Most populations are resident year-round, though some birds move to lower elevations in winter when high-elevation food becomes scarce or snow depth increases.

Behavior

Mountain Chickadees are active, acrobatic foragers, often hanging upside down from twigs and cones while gleaning insects and seeds, typically in small flocks, sometimes joined by nuthatches and kinglets.

Voice

The song is a clear, whistled "fee-bee-bay" (three notes, descending), distinct from the two-note song of the Black-capped Chickadee; the call is a husky "chick-a-dee-dee" similar to relatives but slightly harsher.

Feeding

Diet is a mix of insects and spiders in summer and conifer seeds in winter; like other chickadees, they cache food items in bark crevices for later retrieval.

Nesting

Nests are built in tree cavities, either natural or old woodpecker holes, sometimes excavated by the chickadees themselves in soft, decayed wood. Clutches typically number 5-9 eggs.