Good Crows and Bad Crows It all began a few years ago when a graduate student, Renee Robinette, arrived on the Seattle campus with a yen to study complex behavior among birds.

• 好乌鸦和坏乌鸦这项研究开始于几年前，西雅图大学校园来了一位名叫雷尼·罗比内特的研究生，很想研究鸟类的复杂行为。