Let’s say you’re clever enough to build and use tools, but your species hasn’t learned how to manufacture pants. So you can’t store your hard-won tools in your pocket, or in a belt or box. What to do? One species of crow is showing scientists how it answers that question—and how it changes its strategy based on how likely its tools are to go missing.
New Caledonian crows, native to islands in the southwest Pacific Ocean, are renowned tool makers and users. They prey on bugs that live insi