Indiana Frogs & Toads Field Guide 

From the spring peeper's chorus on a March evening to the deep jug-o-rum of the American bullfrog, Indiana's 17 species of frogs and toads fill wetlands with sound. With permeable skin that absorbs whatever is in their environment, they're sensitive indicators of ecosystem health — which is why HHS helps track them through frog-call surveys. Use the guide below to identify Indiana's frogs and toads by appearance, call, and habitat.