The marsh frogs were in the mood for mating, and put on quite a show with their loud croaking. Do you know how a frog croaks? Much like humans, they fill up their lungs with air and then blow it across their larynx. The hollow chamber on the side that they fill up with air acts as a resonator, much like the hollow wood of the guitar amplifies the sound of the strings. That allows the frog to make the sound audible over long distances, sometimes a mile or more. This has got to be one of the coolest places for a frog to live, ever.

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