All About Bullfrogs . . .

The American Bullfrog has a scientific name Rana catesbeiana.  The American Bullfrog is not native.  It is the largest frog in Arizona (8 inches in length or more).  The color of the American Bullfrog is green or greenish-brown.  The American Bullfrog has blotches or bands on its hind legs.  It also has a really large tympanum, which are the

circles behind its eyes.  The tympanum acts like ears for the frog.  It does not have parotid glands because it is not a toad.  The bullfrog tadpoles have little tiny spots on them.  Bullfrogs will eat almost anything it can fit in its mouth and swallow.  That includes fish, native frogs, bats, mammals, snakes (even rattlesnakes) and birds.  Females can lay up to 20,000 eggs in the water!  American Bullfrogs are a threat to our native species, like our native leopard frogs and Mexican Gartersnake.  It can live in rivers, streams, lakes and ponds from sea level up to 7,000 feet. 
We got most of our information from these 2 sources:
1. A Field Guide to Amphibians and Reptiles in Arizona by Thomas C. Brennan and Andrew T. Holycross.
2. reptilesofaz.org