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Subverting some popular thoughts on tool use and physical intelligence, a group of captive rooks has shown a remarkable capacity to modify and use various tools. Rooks (Corvus frugilegus) are not known to use tools in the wild, although they are closely related to New Caledonian crows (Corvus moneduloides), which are habitual tool users.
Lab Anim. (NY) 38, 220 (2009).
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