Tool use by non-tool-using animals: Sticks and stones | The Economist
- FINDING animals that engage in the human activity of tool use has become a bit of a cottage industry. Chimpanzees, orang-utans, monkeys, various birds and even some insects can manage it. Finding a species that can use tools but doesnâ€™t is, however, a surprise. But that is what Christopher Bird and Nathan Emery of Cambridge University have done. As they report in the Proceedings of the National Academy of Sciences, they have discovered that rooks, which have never been seen to use tools in the wild, can learn to use them, and even make them, in the laboratory.