Decades of bird counts point to global warming effects

A new study by the National Audubon Society shows birds are wintering farther north — including in Alaska. The study’s authors say it’s likely because of global warming. They note that over the 40 years the study covers, from 1966 to 2005, the average January temperature in the Lower 48 rose about 5 degrees Fahrenheit.

Libby Casey, APRN – Washington, DC

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