As the activity range of migratory birds is global in scale, it is very difficult to study them, and for a long time, their ecology remained mysterious. Many people are fascinated by migratory birds and find their thoughts turning to the birds’ destinations, which evoke a sense of the seasons and a certain wanderlust. Once tracking studies began to be carried out with the aid of satellites in the 1990s, scientific and technological methods of tracking avian migration were established, and the hitherto-mysterious routes and behavior of migratory birds began to become apparent. At the same time, results have also emerged from field surveys carried out by citizens. Linking these results to science and technology is leading to the discovery of new facts.