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An Invasive Berry Is Turning Birds’ Feathers Red

The mystery of the color-changing woodpecker has been solved. For years, scientists have been confused as to why up to one-third of yellow-shafted northern flickers (Colaptes auratus auratus), a type of relatively common woodpecker, are spotted sporting reddish and orange plumage. A prime theory was to blame it on western red-shafted flickers, which are similar except for their rouge coloration.
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