A team of researchers at the University of St Andrews has discovered how New Caledonian crows (Corvus moneduloides) make one of their most sophisticated tool designs — sticks with a neatly-shaped hooked tip.

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A team of researchers at the University of St Andrews has discovered how New Caledonian crows (Corvus moneduloides) make one of their most sophisticated tool designs — sticks with a neatly-shaped hooked tip.