Looks similar to the bullfrog but is smaller and has a ridge of skin along the sides of the back that is not found on bullfrogs. This is a game animal in Missouri. Consult the Wildlife Code of Missouri for regulations. May be greenish brown or brown, and the legs may have distinct dark spots or bars. The upper lip and parts of the head are often bright green. Adult males have a bright yellow throat. Makes an explosive "bong" that sounds like a loose banjo string.