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"A full-blown crisis": North American bird population down by 3 billion since 1970, new study finds

The skies are emptying out.


The number of birds in the United States and Canada has fallen by 29 percent since 1970, scientists reported on Thursday. There are 2.9 billion fewer birds taking wing now than there were 50 years ago.


https://www.nytimes.com/2019/09/19/science/bird-populations-america-canada.html

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