McKay's bunting (Plectrophenax hyperboreus) is a passerine bird in the longspur family Calcariidae.

Hybrids between the two species have been observed, leading some authorities to treat McKay's as a subspecies of the snow bunting.

The breeding plumage of the male is almost purely white, with only small areas of black on the wingtips and tail.

Non-breeding birds also have warm brown patches on cheeks, crown, and the sides of the neck.

[3] This bunting nests on shingle beaches in hollow drift logs and rock crevices.