Calls illustrating north/south trends, generally showing that higher-pitched and faster calls are in the South; (3.) Calls showing correlation between pitch and size of frog. (Larger frogs have ...

We've been listening to the great outdoors from the comfort of our homes since the invention of the portable tape recorder.

Strangest of all, the Southern toad’s warning vibration sounds like an outtake from an Aphex Twin record. Over the years, Sounds of North American Frogs has become something of a cult classic.