Wrens' calls reveal subtle differences between subspecies

Date:December 27, 2017

Source:American Ornithological Society Publications Office

Summary: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.

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