Nature (1982) : 18x6

Birds may have a reputation for being less than geniuses, but researchers are discovering that some are remarkably smart. Some birds have the capacity to recognize, count, or name different objects. Ravens, for instance, have the ability to solve difficult puzzles, such as untangling a knotted string to free up a tasty treat or figuring out how to steal fish by hauling in an angler’s untended line. And, as shown in the first part of NATURE’s Inside the Animal Mind, crows on the remote Pacific island of New Caledonia have learned a skill that people once thought only primates could master: the use of tools. The birds use long, specially chosen twigs to spear the plump grubs that hide deep beneath the bark of rotting logs.