Extinction Bonin grosbeak

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turnaround video of male specimen, naturalis biodiversity center


the bonin grosbeak discovered beechey pacific expedition, collected 2 specimens on chichi-jima in 1827. following year, kittlitz took several more specimens, gave locality boninsima (= bonin-shima : ogasawara islands). following report of 2 shipwrecked sailors, picked beechey, island make stopover station whalers, settlement begun in 1830. when rodgers-ringgold north pacific exploring , surveying expedition called @ chichi-jima in 1854, naturalist william stimpson not find birds. did find, however, rats , feral goats, sheep, dogs , cats, in addition pigs present in 1828 (and might have been left there beechey provision future castaways). bonin thrush, bonin grosbeak succumbed after 1830 habitat destruction , predation introduced mammals.


the collector a. p. holst told settlers on chichi-jima in 1889 birds had persisted on haha-jima until 1880s. however, given species not reported there neither during 1853 visit of first perry mission japan nor in 1854, seems either erroneous or misunderstanding other island in chichi-jima group. sedentary habits of bonin grosbeak make unlikely present anywhere outside chichijima rettō.







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