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It was extinction by dilution, and to the ornithologists it was just as tragic as the more dramatic demise of the passenger pigeon or the Carolina parakeet. 對(duì)鳥類學(xué)家來說，這和北美候鴿或卡羅來納長(zhǎng)尾小鸚鵡大批大批地死亡同樣悲慘。