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Saunders's gull or the Chinese black-headed gull〔 (''Chroicocephalus saundersi'') is a species of gull in the Laridae family. It is found in China, Hong Kong, Japan, North Korea, South Korea, Macau, Russia, Taiwan, and Vietnam.〔 Its natural habitats are estuarine waters and intertidal marshes. As with many other gulls, it has traditionally been placed in the genus ''Larus'', but based on phylogenetic work some have moved it to ''Chroicocephalus'', while others argue it is sufficiently distinct for placement in the monotypic ''Saundersilarus''.〔Pons J.-M.; Hassanin A.; Crochet P.-A. (2005) Phylogenetic relationships within the Laridae (Charadriiformes: Aves) inferred from mitochondrial markers. Molecular phylogenetics and evolution 37(3):686-699.〕 It is threatened by habitat loss. One of its few remaining strongholds are the Yancheng Coastal Wetlands, which hosts about 20% of the world's population. The Saunders's gull is named after the British ornithologist Howard Saunders. ==Description== This is a very small species of gull with a length of just and, among gulls, only the little gull is smaller. Adults have a black hood and nape during the breeding season.〔Birdlife International〕 It is very pale with a white body, pale grey wings and a narrow black tail band.The legs and short bill are black and the body is squat. Non-breeding birds have a mottled grey hood and nape, and white-tipped wings with black markings on the primaries.〔(【引用サイトリンク】title=Saunder’s gull (''Larus saundersi'') )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Saunders's gull」の詳細全文を読む スポンサード リンク
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