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摘要: Abstract. Bryan's Shearwater (Puffinus bryani) was described in 2011 on the basis of a specimen collected Midway Atoll 1963. This and another recorded early 1990s are sole reliable records to date. Since 1997, we have found six specimens remarkably small Puffinus shearwater morphologically similar Bonin Islands, northwestern Pacific. In this study, examined samples genetically confirm that they Shearwater. A morphological analysis suggests body size relatively long tail characteristics species. Because most recent individual an islet north Chichijima Island 2011, species has evidently survived where it may breed, although exact location remains unclear. Three individuals off were carcasses preyed upon by black rats (Rattus rattus). Attempts made eradicate f...