Bay Curious listener Dave Ellis lives in the South Bay city of Saratoga. When he was a kid growing up there, he remembers loud tree frogs chorusing almost all the time. But now, even in spring when they should be loudest, he says it's eerily quiet. What's going on?

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This story was reported by Dana Cronin. Bay Curious is made by Katrina Schwartz, Christopher Beale and Olivia Allen-Price. Additional support from Jen Chien, Katie Sprenger, Maha Sanad, Ethan Toven-Lindsey and everyone on Team KQED.

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