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8 Apr 2019
Researchers discovered that as many as 600 million birds die in the US every year after flying into skyscrapers.
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31 Jan 1871
San Francisco's skies went dark after millions of birds flew across the city's western side.
Researchers discovered that as many as 600 million birds die in the US every year after flying into skyscrapers.
San Francisco's skies went dark after millions of birds flew across the city's western side.