American bullfrog Lithobates catesbeianus
The American bullfrog is an amphibian.
The American bullfrog is brown, olive or green on the upper body. The belly skin is white to yellow. Its feet are webbed, and the webbing extends to the tip of the toes. The tympanum (eardrum) is wider than the width of the eye. A ridge, known as a dorsolateral fold, extends from the back of each eye to just past the tympanum. Males have a single vocal pouch in the center of the throat.
The American bullfrog is three and one-half inches to six inches in length.
Found statewide, this species lives in lakes, rivers, marshes, ponds and creeks.
The American bullfrog eats nearly anything that it can catch and swallow. Crustaceans, insects, other frogs, snakes, small mammals and birds are eaten.
Breeding takes place from late April through August. The female deposits about 20,000 eggs in water as the male releases sperm on them. Fertilized eggs hatch in less than a week. The tadpoles (larval form) may grow to as long as six inches. They overwinter in the water and transform to the adult form the following spring.
Mammals, birds, reptiles, amphibians and fishes will eat bullfrogs. People eat them, too.
Most amphibians undergo a life cycle with a complete change of form (egg, larva, adult). The male’s call is “jug-o-rum” or “br-wum.” A male bullfrog will defend its territory from other bullfrogs.