Calcarius lapponicus
Large and rather heavy bunting with yellow bill in all plumages. Head of breeding male brightly tricoloured in black, white and warm, rufous brown. Female similar to male, but much duller coloured, and with black parts speckled. All adults show rufous hind-neck. Juveniles show rufous greater coverts and may be confused with Reed Bunting. Differs from RB in yellow bill, dark spots on chest and cleaner markings on cheeks. Often runs along the ground like a mouse.
Song: a short, creaky, brittle phrase, rich in harmonics; "kril-trrlrtt-ti-trlllkrlltrrt". Somewhat reminiscent of Horned Lark, but without its hesitating intro. In form a bit like Snow Bunting, but much less clear tones. Call: A Snow Bunting-like "prrrrit", but tone harder. Also a Snow Bunting-like "pjuu". Other sounds: soft, whistling calls reminiscent of Bullfinch, but with richer harmonics.
Wikipedia: map (se also Xeno-canto below)
Birdlife ecology
