In Aesop's fable 'The crow and the pitcher' a thirsty crow uses stones to raise the level of water in a pitcher to quench its thirst. A new study published online today (06 August) in the journal Current Biology demonstrates that rooks, birds belonging to the corvid (or crow) family, are able to solve complex problems using tools and can easily master the same technique demonstrated in Aesop's fable.
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