西伯利亞銀鷗

Larus vegae

52. 这是一种东亚大型结实的鸥(gull)。成年鸟背部呈相当浅的灰色,眼睛颜色浅,腿部呈暗粉色。未成年鸟需要四年才能从大部分棕色变为完全白色和灰色的成年羽毛;中间羽毛通常斑驳而凌乱。极其多变的羽毛可能使识别变得困难。栖息于内陆和沿海地区,常出没于河口、港口、海滩、湖泊和池塘。常与其他鸥类组成鸟群。成年鸟的背部颜色通常比美洲银鸥(American Herring Gull)稍深。与蒙古鸥(Mongolian Gull)非常相似,区分起来很棘手,但本种头部和喙更大;成年鸟的腿也通常更粉。

识别特征

The Vega gull, East Siberian gull, or East Siberian herring gull (Larus vegae) is a large gull of the herring gull/lesser black-backed gull complex which breeds in Northeast Asia. Its classification is still controversial and uncertain. It is variously treated as a separate species, as a subspecies of the American herring gull (L. smithsonianus) or included with both the American herring gull and European herring gull in L. argentatus. The Mongolian gull Larus mongolicus was formerly regarded as a subspecies of Vega gull. It was described in 1887 from specimens collected on the 1878–1880 Vega Expedition on the Swedish ship SS Vega.

分类信息

Genus: Larus; Family: Laridae; Order: Charadriiformes.

学名
Larus vegae
目
鸻形目
科
鷗科
属
鸥属

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