{"fact":"New Caledonian crows craft two main types of tools: sticks made from twigs and hooked tools from Pandanus leaves.","context":"NC crows manufacture and use two diVerent types of tools across their range: stick tools made from twigs and other similar material (Hunt 1996; Hunt and Gray 2002), and three diVerent tool designs made from the barbed edges of Pandanus species leaves: wide, narrow and stepped (Hunt 1996).","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":254}