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Hoary-headed grebe : ウィキペディア英語版 | Hoary-headed grebe
The hoary-headed grebe (''Poliocephalus poliocephalus'') is a member of the grebe family found in Australia and Tasmania. The bird takes its name from the silvery-white streaking on its black head. It is common in Australia, with a population of about 500,000. Its habitat is similar to that of the Australasian grebe. ==Description== The hoary-headed grebe is a fairly small dark grey and white grebe. It has a brown eye and a black patch under the chin, and a narrow black streak down the back of the neck. During the breeding season the adult's plumage has white streaks over its entire head, giving them the common name of hoary-headed grebe. Juveniles have a white chin and throat and a striped face. Males have two plumage phases: after breeding they lose the buff breast and the white lines on the head, but can usually be identified then by the broad black bar down the nape.〔Trounson, D.& M. (2008) ''Australian Birds: A concise Photographic Field Guide''. Murray David Publishing, Smithfield, NSW ISBN 978-0-9752428-4-1〕
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