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Unread 2019-09-19, 14:08   #1
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"Over the past half-century, North America has lost more than a quarter of its entire bird population, or around 3 billion birds.

That's according to a new estimate published in the journal Science by researchers who brought together a variety of information that has been collected on 529 bird species since 1970.

"We saw this tremendous net loss across the entire bird community," says Ken Rosenberg, an applied conservation scientist at the Cornell Lab of Ornithology in Ithaca, N.Y. "By our estimates, it's a 30% loss in the total number of breeding birds."

Rosenberg and his colleagues already knew that a number of bird populations had been decreasing.

"But we also knew that other bird populations were increasing," he says. "And what we didn't know is whether there was a net change." Scientists thought there might simply be a shift in the total bird population toward more generalist birds adapted to living around humans." (More)
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Unread 2019-09-19, 14:48   #2
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Go Back   Mechapixel Forums > Main > Aarkie's Corner > North America Has Lost 3 Billion Birds Over Last 50 Years, Scientists Say
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