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California towhee : ウィキペディア英語版
California towhee

The California towhee (''Melozone crissalis'') is a bird of the family Emberizidae, native to the coastal regions of western Oregon and California in the United States and Baja California Sur in Mexico.
The taxonomy of this species has been debated. At the higher level, some authors place the towhees in the family Fringillidae. Within the group, there has been debate about whether the distinction between this species and the similar canyon towhee (''Melozone fuscus'') should be at the specific or subspecific level. The two populations are quite isolated from each other, and molecular genetics seems to have settled the matter in favour of two distinct species for the present. On the other hand there seems to be little distinction between the northern and Baja Californian populations within ''M. crissalis''.
==Appearance==
The California towhee's coloring is dull brown overall with light rust undertail coverts and buff or rust colored streaks at the throat. There is little sexual dimorphism. It is around in length, and has a noticeably long tail 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.〕 Its appearance suggests a large, plain sparrow. Males weigh from , with an average of , while females weigh from , with an average of .〔''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 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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