Dark-eyed JuncoJunco hyemalis
5-6 1/4" (13-16 cm). This species shows much geographic variation in color. Typically, male of western population ("Oregon Junco") has black hood, chestnut mantle, white underparts with buff sides. Eastern male ("Slate-colored Junco") is dark slate-gray on head, upper breast, flanks, and upperparts, with white lower breast and belly. Both forms have pink bill and dark gray tail with white outer tail feathers conspicuous in flight. The pine forests of the Black Hills in western South Dakota and eastern Montana have an isolated population ("White-winged Junco") similar to the eastern form but with 2 white wing bars and extensive white outer tail feathers. Birds of the Southwest ("Gray-headed Juncos") are gray overall, with a reddish-brown back. Female "Oregon Junco" has gray hood; females of all forms less colorful.