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''Sterna'' is a genus of terns in the bird family Sternidae. It used to encompass most "white" terns indiscriminately, but mtDNA sequence comparisons have recently determined that this arrangement is paraphyletic (Bridge ''et al.'', 2005). It is now restricted to the typical medium-sized white terns occurring near-globally in coastal regions. ==Classification== Genus ''Sterna'' - typical white terns *Forster's tern ''Sterna forsteri'' *Snowy-crowned tern or Trudeau's tern ''Sterna trudeaui'' *Common tern ''Sterna hirundo'' *Roseate tern ''Sterna dougallii'' *White-fronted tern ''Sterna striata'' *Black-naped tern ''Sterna sumatrana'' *South American tern ''Sterna hirundinacea'' *Antarctic tern ''Sterna vittata'' *Kerguelen tern ''Sterna virgata'' *Arctic tern ''Sterna paradisaea'' *River tern ''Sterna aurantia'' *Black-bellied tern ''Sterna acuticauda'' (possibly ''Chlidonias'') *White-cheeked tern ''Sterna repressa'' (possibly ''Chlidonias'') For the "brown-backed terns" see genus ''Onychoprion''. 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「Sterna」の詳細全文を読む スポンサード リンク
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