The Mexican Chickadee (Poecile sclateri) occurs only in a very limited area of the state. Its U.S. range is confined to the higher elevations of the Chiricahua Mountains in southeastern Arizona, where it inhabits mixed-conifer and pine-oak forests at elevations generally above 6,500 feet. This makes it one of the more localized and sought-after bird species in Arizona.
The species is a small, energetic songbird measuring about 5 inches (13 cm) in length. It is similar in appearance to the Mountain Chickadee (Poecile gambeli) but lacks the distinctive white eyebrow stripe. Mexican Chickadees have black caps and bibs, white cheeks, and grayish backs and wings, with pale underparts that may be washed with buff along the flanks. Their call notes and vocalizations are also distinctive, aiding identification in the field.
In Arizona, they are resident year-round, nesting and foraging in the Chiricahuas. Their presence in the United States represents the northernmost extension of their range, which otherwise extends southward through the highlands of Mexico. Because of their restricted distribution in Arizona, birders often travel specifically to the Chiricahua Mountains—especially areas like Rustler Park—to see this species.
