Feb 10, 2009
North American birds are moving north and inland to escape climes that have heated up with global warming, according to a report released today that warns that some species risk being wiped out if climate change makes their natural habitats unlivable.
One-hundred-seventy-seven of the continent's 305 most common birds shifted their range farther north over the past four decades than in previous years, according to the Audobon Society's Christmas Bird Count. The annual survey is based on reports from 50,000 "citizen scientists" on birds they spot at more than 2,000 locations in the Americas over the last two weeks in December. It's been conducted for the past 109 years.
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