Half of All North American Birds Threatened by Climate Change
![](https://media.wnyc.org/i/800/0/l/85/1/2012_Allens_Hummingbird_LoiNguyen_AudubonPhotographyAwards.jpg)
Allen's Hummingbird
( Loi Nguyen/Audubon Photography Awards )
( Loi Nguyen/Audubon Photography Awards )
Produced by Ellen Frankman