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News Release 13-092
Evolution in the Blink of an Eye
Diseases may rapidly evolve to become more--or less--virulent, according to songbird study
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A healthy male house finch visits a seed feeder; the finches are common at bird feeders.
Credit: Carl Peters/Cornell University
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Male house finches are rose-red and brown; females are gray-brown and streaked.
Credit: Elena Petrcich/Cornell University
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House finches that contract eye disease (male shown here) develop swollen, weepy eyes.
Credit: Andy Davis/Cornell University
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Two male house finches on snow-dusted perches in Montana; these birds are healthy.
Credit: Jeanette Tasey/Cornell University
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A healthy male house finch perches on a bramble in Pennsylvania.
Credit: Kelly Colgan Azar
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House finch photo showing the beak, which is evolved for eating seeds.
Credit: Wikimedia Commons
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