The European robin migrates from Scandinavia down to the Mediterranean, every autumn, and like a lot of other marine animals and even insects, they navigate by sensing the Earth's magnetic field.
欧洲斯堪的纳维亚的知更鸟 每个秋天都会迁徙到地中海， 就和许多其它海洋动物甚至是昆虫一样， 它们都靠感应地球磁场来感知方向。