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Arctic redpoll
The Arctic redpoll (''Acanthis hornemanni''), known in North America as the hoary redpoll, is a bird species in the finch family Fringillidae. It breeds in tundra birch forest. It has two subspecies, ''A. h. hornemanni'' (Greenland or Hornemann's Arctic redpoll) of Greenland and neighbouring parts of Canada, and ''A. h. exilipes'' (Coues's Arctic redpoll), which breeds in the tundra of northern North America and Eurasia. Many birds remain in the far north; some birds migrate short distances south in winter, sometimes travelling with common redpolls.
The binomial commemorates the Danish botanist Jens Wilken Hornemann.
==Description==
The Arctic redpoll is similar in appearance to the common redpoll but generally paler. It may be distinguished from that species by the unstreaked pale rump patch and the uniformly pale vent area. The Greenland race is a very large, pale bird, with the male sometimes described as a "snowball", but both forms are pale with small beaks, white rumps and often more yellow than grey-brown tones in their plumage. They have black bibs, orangish forehead patches and two light-coloured stripes on each wing. The females are more streaked on their breasts, sides and rumps, but are still pale. Adults are about in length and weigh about .〔(【引用サイトリンク】title=Arctic Redpoll: ''Carduelis hornemanni'' )〕
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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