The river frog can be found in the southeastern portion of the United States. The dorsal surface of the frog is a greenish black color. The skin is more rugose than the skin of most other ranid frogs.
Males often have a yellowish suffusion on the throat.
The river frog has no dorsolateral ridges as found in many other ranid frogs. Tadpoles of the river frog are rather large, reaching 4 inches before metamorphosis. The tadpoles undergo ontogenetic color changes. Reproduction Male river frogs call to attract local females from April into July. The call of larger more mature frogs is a deep, low pitched, roaring snore.