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Wrens' calls reveal subtle differences between subspecies


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Birds' songs and the ways they vary between places have been well studied -- but what can the simpler vocalizations known as calls tell us about bird biology? A new study provides the first detailed description of how Marsh Wren calls vary across eastern North America and hints at the evolutionary processes playing out between wren subspecies.cMynIlVTICc


Read the full article on ScienceDaily

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