Appreciation: Urban birds' beak shape rapidly changed during COVID-19 lockdowns

Junglekeeper · Dec 21, 2025

Urban birds' beak shape rapidly changed during COVID-19 lockdowns, suggesting human-driven transformations

Birds hatched during the pandemic had beaks similar to wild juncos, but as human activity picked up again, their beaks reverted to the short, stout form seen in urban populations. These results indicate that city birds quickly adjusted their behavior when human activity stopped and started again.
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Appreciation: Urban birds' beak shape rapidly changed during COVID-19 lockdowns

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