喙与脑：使用工具的鸟类

These child prodigies of the animal kingdom have feathers and beaks – and very special skills!
　　The Keas of New Zealand are the only parrots that live in snowy mountain areas. They like testing their brains, solving puzzles and challenging tourists: they unscrew bottle-tops, dismantle windscreen wiper blades and tear open rucksacks. They seem so determined you’d think they have ...