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Bird populations across North America have fallen by billions over the last 50 years, according to a staggering report from Cornell University. Researcher Amanda Rodewald explains what’s happening, and why common birds like sparrows, blackbirds and finches are suffering the greatest losses.
By CBC4.3
112112 ratings
Bird populations across North America have fallen by billions over the last 50 years, according to a staggering report from Cornell University. Researcher Amanda Rodewald explains what’s happening, and why common birds like sparrows, blackbirds and finches are suffering the greatest losses.

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