https://www.scrippsnews.com/science-and-tech/tree-frogs-in-taiwan-use-drains-as-mating-call-megaphones
Tree Frogs In Taiwan Use Drains As Mating Call Megaphones (VIDEO)
Jun 6, 2014 - Researchers have discovered a certain type of tree frog in Taiwan is using storm drains to amplify their mating calls, kind of like a megaphone.
frogs in taiwanmating calltreeuse