Field Guide

The green frog looks similar to a bullfrog but is smaller and has a ridge of skin along the sides of the back that is not found on bullfrogs. It is a game animal in Missouri.

The American bullfrog is Missouri’s largest frog. This common species is easy to hear on warm nights when the males call a deep, sonorous “jug-a-rum, jug-a-rum” that can be heard from half a mile away.

American toads are well-known and occur statewide. Missouri has two subspecies: the eastern American toad in the northern half, and the dwarf American toad in the southern half.

The voices of spring peepers are a true announcement that winter is ending. These small, slender frogs can be several overall colors, but seeing an X on the back is a good way to ensure your identification.

The eastern spadefoot is a stout, toadlike amphibian with large, protruding eyes, vertically oval pupils, short legs, and large feet. In Missouri, it occurs in eastern counties along the Mississippi River and in the Bootheel.

Fowler's toad is the common toad of gravel and sand bars along our many Ozark streams and rivers. It is also the most common toad in the Bootheel lowlands.

The Rocky Mountain toad has a number of irregular dark brown or black spots on the back and a white belly. It occurs in the Missouri River floodplain, mostly from the central to the far northwestern parts of the state.

The plains spadefoot is a stout, toadlike amphibian with large, protruding eyes, vertically oval pupils, short legs, and large feet. There is a raised area between the eyes. It occurs in counties along the Missouri River.

The bright green treefrog hides perfectly among cattail leaves, where it rests until evening. Then it begins hunting for insects. In Missouri, it occurs mostly in the Bootheel.