{"fact":"New Caledonian crows exhibit remarkable tool-making skills, crafting hooked tools from twigs to extract prey, demonstrating an understanding of tool functionality and even exhibiting \"handedness\" in their crafting process.","context":"The authors describe hooked-twig tools that crows manufactured from living secondary twigs. All were stripped of leaves and bark and had a hook on their wide ends. All birds used the hook end of those tools and by rapid back and forth movements picked up prey under detritus. Hook use suggests an appreciation of tool functionality... Hunt, 2000; Hunt, Corballis, & Gray, 2001).","source":"Janina A. Kirsch; Onur Güntürkün; Jonas Rose, Insight without cortex: Lessons from the avian brain, 10.1016/j.concog.2008.03.018","index":336}