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This photo provided by Jessica McLachlan shows a fairy-wren. Scientists have discovered that birds can learn to recognize alarm calls of other species, essentially by learning to eavesdrop in a second language. The Australian songbird called the fairy wren isn’t born knowing other birds’ chirps, but it can learn to recognize a few “words”. In a paper published Thursday, August 2, 2018, in the journal Current Biology, scientists explained how they taught the birds the distress calls of other species.(Photo by Jessica McLachlan via AP Photo)
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