Here is a short video recording of a single Bufo cognatus calling at sunset. There is also a good number of Hyla chrysoscelis calling around the same pond. I will take a flashlight with me tonight and see if I can catch the little dudes in action.
Sorry about the quality, had to use the cell phone...
Listen carefully, the flooded river, the factory I work at and the Cope's Gray Treefrogs darn there drown out the toad.
They really do sound like a ball-peen hammer being whacked on an anvil!
The yellow lites are a wastewater treatment plant, but feel free to tell your friends it is a monster...