Songbirds delight us with their music, but at times they might sound repetitive. That’s because songbirds have to practice their singing to keep performing at their best. Researchers studying Zebra Finches found that females preferred the songs of males that had been practicing consistently compared to males that had taken a break from singing for a few days. So it seems that birds must keep their vocal muscles in shape to make sure everyone hears them loud and clear.

More info and transcript at BirdNote.org. 

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