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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, Aug. 2, 2018,  in the journal Current Biology, scientists explained how they taught the birds the distress calls of other species.(Jessica McLachlan via AP)

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, Aug. 2, 2018, in the journal Current Biology, scientists explained how they taught the birds the distress calls of other species.(Jessica McLachlan via AP)

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