Mexican Chickadee

The Mexican Chickadee closely resembles its northern relatives with a black cap and bib, gray back, and pale underparts, but it is distinguished by an extensive black bib that reaches farther down the breast than in other chickadees, along with grayish (not white) flanks. This species reaches the United States only in a handful of high mountain ranges of extreme southeastern Arizona and southwestern New Mexico, such as the Chiricahua Mountains, making it a prized target for birders visiting the region, while the bulk of its range lies within the mountains of Mexico.

It inhabits high-elevation pine, pine-oak, and fir forest, often occurring above 2,100 meters (7,000 feet), and behaves much like other chickadees, foraging actively in small flocks.

Key Field Marks

• Black cap and extensive black bib reaching well down onto the breast
• Gray back, wings, and tail
• Grayish (not bright white) flanks and underparts
• White cheek patch

Similar Species

• Mountain Chickadee: has a white eyebrow stripe, which the Mexican Chickadee lacks, and a smaller black bib.
• Black-capped Chickadee: has a smaller, more restricted black bib and does not overlap in range with the Mexican Chickadee in the U.S.
• Range is the most reliable clue: within the United States, this species occurs only in a few isolated "sky island" mountain ranges near the Mexican border.

Habitat

Mexican Chickadees inhabit high-elevation coniferous and pine-oak forest, typically montane pine, fir, and mixed forest well above the surrounding desert and grassland.

Range

The species is widespread in the mountains of Mexico, reaching the United States only in isolated "sky island" ranges of extreme southeastern Arizona (notably the Chiricahua Mountains) and adjacent southwestern New Mexico.

Migration

Mexican Chickadees are largely non-migratory residents, remaining within their montane forest habitat year-round, though some local elevational shifts may occur with seasonal weather.

Behavior

Like other chickadees, this species forages actively and acrobatically in small flocks, often associating with other montane songbirds such as nuthatches and Yellow-eyed Juncos.

Voice

The call is a hoarse, buzzy "chick-a-dee-dee-dee," similar in structure to other chickadees but distinctive in tone; song consists of simple whistled phrases.

Feeding

Diet includes insects and spiders gleaned from conifer and oak foliage, along with conifer seeds, especially outside the breeding season.

Nesting

Nests are built in tree cavities, often old woodpecker holes in pine or fir snags, lined with moss, fur, and feathers. Clutches typically number 6-8 eggs.