Aethia


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Aethia

 

a genus of birds of the family Alcidae of the order Charadriiformes. There are three species: the crested auklet (A. cristatelld), with a body length of about 25 cm; the whiskered auklet (A. pygmaea), measuring about 20 cm long; and the least auklet (A. pusilla), about 19 cm long. Seabirds, they spend all their time except for the mating season over open seas. The Aethia are distributed in the northern parts of the Pacific Ocean. In the USSR they inhabit the islands and coasts of the Bering Sea, the Sea of Okhotsk, and the Chukchi Sea. They nest in large colonies in crevices of cliffs and on rock streams; they feed on small marine invertebrates. In some places they have commercial significance; the meat is used.

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columba Auklet (unidentified) * 171 111 Least Auklet Aethia 84 83% 55 pusilla Crested Auklet A.
Crested auklets, Aethia cristatella, are typical monomorphic biparental seabirds, with pairs breeding once per year, sharing equally in incubation (average 37 d) and feeding of the young (approximately 35 d; Knudtson and Byrd 1982).
Crested Auklet Aethia cristatella and Least Auklet Aethia pusilla: These planktivorous species were first observed at sea beginning around the second half of May.
The suggestion that Aethia auklets breed along the northern coastline of the Chukotka Peninsula (Golovkin and Flint, 1975) was not supported by our survey results: no signs of any auklets were found along the north coast west of Cape Volnistyi.