Song: When the humans quieted in COVID-19-stricken San Francisco, the songbirds could hear. With traffic diminished, the songs of the white-crowned sparrow (pictured above) improved surprisingly fast, a new study says. “The
songs didn’t change as much as we predicted—they changed even more,”
ecologist Liz Derryberry tells us. “It highlights just how big of an effect
noise pollution has.”
NATIONAL GEOGRAPHIC
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