Thousands of birds die each spring and fall when they collide with Chicago's skyscrapers, which lie on a major migration path between Canada and Latin America.
원문출처 : https://www.cnn.com/2022/02/11/americas/birds-brains-climate-change-scn/index.html
원문출처 : https://www.cnn.com/2022/02/11/americas/birds-brains-climate-change-scn/index.html