{"fact":"When offered a poorly designed stick tool, some New Caledonian crows cleverly modify it by removing parts to make it more useful.","context":"Four birds attempted to remove or reduce the extensions on the non-functional tools...However, removing or shortening the lateral extension to make the tool functional was a less eYcient strategy time-wise than Xipping the tool.","source":"Jennifer C. Holzhaider; Gavin R. Hunt; Victoria M. Campbell; Russell D. Gray, Do wild New Caledonian crows (Corvus moneduloides) attend to the functional properties of their tools?, 10.1007/s10071-007-0108-1","index":256}