Hummingbird Evolution Was Fast, but Is Slowing

April 3, 2014 6:11 PM

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Hummingbird Evolution Was Fast, but Is Slowing

Hummingbirds have evolved into hundreds of different species very rapidly over the past 22 million years, according to a study that presents the first-ever comprehensive hummingbird evolutionary tree.

A total of 338 hummingbird species are known to flutter the world today in a wide variety of environments, including highly inhospitable mountaintops with low oxygen levels. Researchers were interested in studying how these birds evolved to inhabit these harsh environments, but they needed a concret...

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