ClipArt ETC
"Upper part ashy-gray, with scarcely a shade, and only on the rump, under parts similarly grayish-white, without a rusty tinge, the middle of the belly, the rest more heavily shaded. Wings and tail with comparatively little whitish edging - tail at least with no more than that of P. carolonensis. Sides of the head and neck white; top of the head, and the throat, black. A conspicuous white superciliary stripe in the black cap, usually meeting its fellow across the forehead." Elliot Coues, 1884

Mountain Chickadee

"Upper part ashy-gray, with scarcely a shade, and only on the rump, under parts similarly grayish-white,…