鸥科|鸥属
学名:Larus cachinnans
英名:Yellow-legged Gull
形态:大型水鸟,体长55-68cm。成鸟繁殖羽头、颈和下体至尾羽白色,肩、背及翼上灰色,与黑色翼尖对比明显,次级及三级飞羽后缘白色。停栖时黑翼尖超出尾羽甚长,有明显白斑。 非繁殖羽头后有稀疏暗褐色纵纹。第一年冬羽嘴粉褐色,先端黑色。全身大致污白色,具暗褐色斑点,尾羽黑色。第二年尾基、前额和下体白色。
虹膜黄色;嘴黄色,下嘴先端具红斑;脚浅黄色。
分布:中国东部及沿海地区有分布。在保护区属常见的冬候鸟。
习性:夏季栖息于苔原、河流、湖泊、海岛等地,冬季主要栖息于海岸及河口地区。松散的群栖性。主要以鱼和水生无脊椎动物为食。
ID: Large water bird.Body length 55-68cm.Adult breeding head, neck, underbody and tail white, scapulars, mantle and wings grey contrasting with black wing tips, and trailing edge of secondaries and tertials white.At rest, black wing tips extends well beyond tail with white spots.Non-breeders has faint dull brown streaking on hindneck.1 st-winter bill dull pinkish,black at tip.Whitish overall, spotted dark brown.Tail black.2nd-winter base of tail, forehead and underbody white.
BP: Eyes yellow; bill yellow, with red gonys spot; tarsi pale yellow.
SD: Common winter visitor.
HH: Breeds in tundras, rivers, lakes and offshore islands.Winters at coasts and estuaries, in loose flocks.Feeds mainly on fish and aquatic invertebrates.
黄腿银鸥
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