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McKay's bunting
McKay's bunting (''Plectrophenax hyperboreus'') is a passerine bird in the longspur family Calcariidae. It is most closely related to the snow bunting (''P. nivalis''). Hybrids between the two species have been observed, leading some authorities to treat McKay's as a subspecies of snow bunting. As the Plectrophenax buntings are nested within the Calcarius clade, their closest relatives are the longspurs. McKay's bunting breeds on two islands in the Bering Sea, St. Matthew and Hall islands, and winters on the western coast of the U.S. state of Alaska.
==Description==
This species closely resembles snow bunting in all plumages, but is whiter overall. The breeding plumage of the male is almost purely white, with only small areas of black on the wingtips and tail. The breeding female has a streaked back. Non-breeding birds also have warm brown patches on cheeks, crown, and the sides of the neck.〔()〕 McKay's bunting is larger on average than the snow bunting. It is long and weighs from , with an average of .〔''Sparrows and Buntings: A Guide to the Sparrows and Buntings of North America and the World'' by Clive Byers & Urban Olsson. Houghton Mifflin (1995). ISBN 978-0395738733.〕〔''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.〕 Among standard measurements, the wing chord is , the tail is , the bill is and the tarsus is .〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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