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downy woodpecker : ウィキペディア英語版
downy woodpecker

The downy woodpecker (''Dryobates pubescens'') is a species of woodpecker, the smallest in North America.
== Description ==

Adult downy woodpeckers are the smallest of North America's woodpeckers but there are many smaller species elsewhere, especially the piculets. The total length of the species ranges from and the wingspan from . Body mass ranges from . Standard measurements are as follows: the wing chord is , the tail is , the bill is and the tarsus is .〔''Woodpeckers: An Identification Guide to the Woodpeckers of the World'' by Hans Winkler, David A. Christie & David Nurney. Houghton Mifflin (1995), ISBN 978-0-395-72043-1〕〔(Downy woodpecker Species Account )〕〔(Downy Woodpecker, Life History, All About Birds - Cornell Lab of Ornithology )〕 The downy woodpecker is mainly black on the upperparts and wings, with a white back, throat and belly and white spotting on the wings. There is a white bar above the eye and one below. They have a black tail with white outer feathers barred with black. Adult males have a red patch on the back of the head whereas juvenile birds display a red cap.
The downy woodpecker is virtually identical in plumage pattern to the larger hairy woodpecker, but it can be distinguished from the hairy by the presence of black spots on its white tail feathers and the length of its bill. The downy woodpecker's bill is shorter than its head, whereas the hairy woodpecker's bill is approximately equal to head length.
The downy woodpecker gives a number of vocalizations, including a short ''pik'' call. Like other woodpeckers, it also produces a drumming sound with its beak as it pecks into trees. Compared to other North American species its drums are slow.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「downy woodpecker」の詳細全文を読む



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