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北极狐怎么被红狐吃了?
近年来,研究人员记录了多起红狐猎杀北极狐的事件。研究表明,红狐侵入北极狐的巢穴,捕食北极狐幼崽甚至成体已成为一种新现象。在阿拉斯加普鲁多湾的研究中,从2005年到2012年,红狐占据的巢穴从15%上升至几乎所有巢穴,北极狐则不再返回已被红狐占据的巢穴 ...
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