{"fact":"Some New Caledonian crows were so good at replicating templates that they would further modify already-manufactured pieces to better match the rewarded size.","context":"On a number of trials, after detaching a section of card, Emma modified the size of the detached piece before dropping it into the vending machine… In all cases, modifications were made to pieces that were longer than the template, and, following modification, all pieces became more similar in length to the rewarded template.","source":"S. Jelbert; S. Jelbert; R. Hosking; Adrian H. Taylor; R. Gray; R. Gray; R. Gray, Mental template matching is a potential cultural transmission mechanism for New Caledonian crow tool manufacturing traditions, 10.1038/s41598-018-27405-1","index":185}