{"fact":"Even within the same species, New Caledonian crows exhibit remarkable diversity in their tool use, varying the types of tools they create and how they use them depending on the specific grub they are trying to extract and where they live.","context":"Nevertheless, tool use by the crows still varies considerably across individuals and populations in the diversity and types of foraging tools made and used (Hunt & Gray, 2002, 2003).","source":"Gavin R. Hunt; Russell D. Gray; Alex H. Taylor, Why is tool use rare in animals?, 10.1017/cbo9780511894800.007","index":454}