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A Sparrow Song Remix Took Over North America With Astonishing Speed by Jack J. Lee

A variation on the white-throated sparrow’s song spread 3,300 kilometers in just a few decades Some North American birds are changing their tune. The traditional song of the white-throated sparrow (Zonotrichia albicollis) ends with a repeated triplet of notes. By 2000, however, some birds in western Canada were whistling a variation ending in a two-note […]