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crested auklet
The crested auklet (''Aethia cristatella'') is a small seabird of the family Alcidae, distributed throughout the northern Pacific and the Bering Sea. The species feeds by diving in deep waters, eating krill and a variety of small marine animals. It nests in dense colonies of up to 1 million individuals in the Bering Sea and the Sea of Okhotsk. It often breeds in mixed-species colonies with the least auklet, a smaller congener.
The species is known for its sexual ornaments, found in both males and females. These include colorful plumage with a forehead crest, a striking scent recalling citrus fruit, and a loud trumpet call, all of which appear to have evolved through sexual selection. The total population is around 6 million, almost half in North America. It is in general considered to be of least concern, though the Alaskan population faces additional threats from predation and oil spills.
==Taxonomy==
The crested auklet was first identified in 1769 by the German zoologist Peter Simon Pallas, who named it ''Aethia cristatella''. The genus ''Aethia'' includes four auklet species. There are no subspecies of crested auklet.〔 The family Alcidae consists of many species of shorebirds including other auklets (not in the genus Aethia), puffins, razorbills, guillemots, and murres.〔(【引用サイトリンク】url=http://tolweb.org/Aethia/90582 )〕
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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