Mike Powell

Have you ever watched a frog as he was croaking?

Apparently he closes his mouth and nostrils, squeezes his lungs, and his vocal sacs expand, looking a lot like a bubblegum bubble.

Southern Leopard Frogs (Lithobates sphenocephalus) have a vocal sac on either side of their head, although some other frogs have only a single sac under their chin,

Here’s a shot I took on Monday of one as he was croaking. You can see the vocal sac bubble pretty wellif you look closely at the side of the head nearest the camera.

I am including this additional frog photo, because I really like the way that the bubbles surround his head.

© Michael Q. Powell. All rights reserved