Looking at the satellite image the first bird seems to have taken a tortuous route from the Yellow Sea to Alaska, until the weather map is superimposed on the image.

• 而且综合候鸟的路线和天气图可以看出，虽然从直线距离上看候鸟好像多绕了一些路，但是其实它们是为了绕开恶劣天气！