These songbirds sing for hours a day to keep their vocal muscles in shape
![New research suggests that zebra finches must sing a lot to maintain top-tier singing performances.](https://media.npr.org/assets/img/2023/12/12/gettyimages-1239044135_wide-18f34491dafd64d62e6624ae8cc1412fa2efb22d.jpg?s=600)
Zebra finches who did not sing every day quickly lose their vocal prowess, a new study finds. The results could potentially shed light on vocal rehabilitation for humans, too.
(Image credit: Mustafa Ciftci/Anadolu Agency via Getty Images)
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