Over [ half the bird species in the US ]( http://www.theguardian.com/environment/2014/sep/09/north-america-birds-extinction-study-climate-change ) , including the bald eagle, are threatened by global heating.
Ссылка: https://stallman.org/archives/2014-jul-oct.html#10_September_2014_%28Global_heating_threatens_US_birds%29