Summary A recent study trained three tool-naïve carrion crows ( Corvus corone ) to use a stick tool for getting a reward out of a crevice. Automated tracking of tool tips showed gradual changes of their trajectories, demonstrating improved efficiency in their tool dexterity over time (Moll et al. Current Biology, 35, 4845-4852, 2025).
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Shoko Sugasawa (2025) studied this question.
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