Evolution. How birds got their beaks.

Abstract

W hen birds got their wings, they lost the clawed fingers wielded by their dinosaur relatives. But they evolved a new “finger”—in their face. And what a boon that has been. Agile beaks of all shapes and sizes, from the gulping gape of a pelican to the needle nose of a hummingbird, have enabled the 10,000 avian species to thrive from the Arctic to the… (More)
DOI: 10.1126/science.348.6236.744

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