Hunt like a bat! How baby bats learn to eavesdrop on their next meal

Most bats use echolocation to navigate and hunt, but some use their ears for another trick: eavesdropping. "And then these frog-eating bats, for example, they are actually listening in on the mating calls of frogs that are much, much lower in frequency," says behavioral ecologist Rachel Page. But how the bats knew this eavesdropping trick was a mystery. So she set up and experiment with baby bats and a speaker. Have a question about the animals all around us? Email us at shortwave@npr.org — we'd love to hear from you!Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at plus.npr.org/shortwave.

May 14, 2025 - 08:12
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Hunt like a bat! How baby bats learn to eavesdrop on their next meal
A fringe-lipped bat preys on a túngara frog in Panama.

Most bats use echolocation to navigate and hunt, but some use their ears for another trick: eavesdropping.

"And then these frog-eating bats, for example, they are actually listening in on the mating calls of frogs that are much, much lower in frequency," says behavioral ecologist Rachel Page.

But how the bats knew this eavesdropping trick was a mystery. So she set up and experiment with baby bats and a speaker.

Have a question about the animals all around us? Email us at shortwave@npr.org — we'd love to hear from you!

Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at
plus.npr.org/shortwave.