Gray-headed ChickadeePoecile cinctus
4.5-5" (11-13 cm). Grayish-brown cap, white cheeks, and black bib; upperparts grayish-brown, showing little contrast with nape and crown; breast and belly whitish, flanks pale buff. In northern Europe, species has browner crown, more contrast between nape and back, and brighter buff on flanks. Gray-headed Chickadee appears more robust, long tailed, and fluffy than other American chickadees.