The Mountain Chickadee, Poecile gambeli, is an inquisitive - seemingly friendly small bird in the Paridae family (Chickadees and Tits).
They are superficially very similar to the Black-capped Chickadee. At times, the white line above the eye may be a bit hard to see and you could miss the identification.
They tend to live at higher elevations than the Black-capped Chickcadees, but may occur in mixed flocks.
They live throughout the far western part of Canada and the United Sates.
Classification:
Order: Passeriformes
Family: Paridae
Genus: Poecile
Species: P. gambeli
My photos:
Mountain Chickadee - Poecile gambeli

Mountain Chickadee - Okanogan County, Washington State, USA - Taken 1/21/2009
Mountain Chickadee - Poecile gambeli

Mountain Chickadee - Okanogan County, Washington State, USA - Taken 1/21/2009