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The roseate tern (''Sterna dougallii'') is a seabird of the tern family Sternidae. ==Taxonomy== English naturalist George Montagu described the roseate tern in 1813. Genetically, it is most closely related to the white-fronted tern (''S. striata''), with their common ancestor a sister lineage to the black-naped tern (''S. sumatrana''). This species has a number of geographical races, differing mainly in bill colour and minor plumage details. ''S. d. dougallii '' breeds on the Atlantic coasts of Europe and North America, and winters south to the Caribbean and west Africa. Both the European and North American populations have been in long term decline, though active conservation measures have reversed the decline in the last few years at some colonies, most notably at Rockabill Island off the coast of Dublin, Ireland, which now holds most of the European population (about 1200 pairs). The tropical forms ''S. d. korustes'' and ''S. d. bangsi'' are resident breeders from east Africa across the Indian Ocean to Japan. They have more red on the bill. The long-billed and short-winged ''S. d. gracilis'' breeds in Australia and New Caledonia. The north-western Indian Ocean holds populations of ''S. d. arideensis''. Some authors suggest that only three races ''arideensis'', ''gracilis'' and nominate ''dougallii'' should be retained.〔Gochfeld, M. & Burger, J. 1996. Family Sternidae (terns). In: Del Hoyo, J., Elliott, A A. & Sargatal, J. (Eds). Handbook of birds of the world, Vol. 3. Barcelona: Lynx Edicions. pp. 624–667.〕〔Tree, AJ (2005) The known history and movements of the Roseate Tern ''Sterna dougallii'' in South Africa and the western Indian Ocean. Marine Ornithology 33:41-47 (PDF )〕 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「roseate tern」の詳細全文を読む スポンサード リンク
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