WHY do frogs squawk?

Only male frogs make squawking sounds. Quacking is a way to attract females during the mating season.

In order to make a squawking sound, a frog takes a deep breath, closes its nostrils and mouth, and presses air from its lungs to its mouth and back again. Passing through the vocal cords, the air stream touches them, they begin to vibrate, and a quacking sound is heard.

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