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Band-tailed pigeon
The band-tailed pigeon (''Patagioenas fasciata'')〔 is a medium-sized bird of the Americas. Its closest relatives are the Chilean pigeon, passenger pigeon and the ring-tailed pigeon, which form a clade of ''Patagioenas'' with a terminal tail band and iridescent plumage on their necks.〔 Some authorities split this species into the northern band-tailed pigeon (''Patagioenas fasciata'')〔 and the southern band-tailed pigeon (''Patagioenas albilinea'').〔
It ranges from British Columbia, Washington, Oregon, California, and southern Arizona south in higher elevations through Mexico and Central America to northern Argentina. In autumn it migrates out of its permanent resident range into northern California, New Mexico, and parts of Utah and Colorado. Populations from Costa Rica south are sometimes considered a separate species, the white-naped pigeon (''P. albilinea'').〔 It is found at altitudes from , generally in oak, pine-oak, and coniferous forests. It feeds on seeds, notably acorns.
==Morphology==
It is the biggest pigeon in North America, measuring long and weighing .〔〔 The coastal subspecies ''P. f. monilis'' (averaging ) is larger than the inland subspecies (averaging ).〔 The plumage is gray, somewhat darker above. The head and underparts have a faint pink cast, especially in the adult male; the belly is nearly white. The distal half of the tail is also pale (except in the subspecies of Baja California), whence the English name. The bill and feet are yellow, good identification marks at sufficiently close range. Adults have green iridescence on the back of the neck, adjacent to a thin white collar on the nape. Juvenile birds have white feather edges above, giving a scaly appearance.
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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