Frogs and Toads of Utah
The American Bullfrog is the largest native frog in the United States. There is no dorsal ridge that runs down its back on the American Bullfrog. This is the distinguishable characteristics of the frog.
The Green Frog looks very much like the American Bullfrog but it’s a tad smaller. It has a dorsal ridge that runs down its back but they are incomplete and do not reach all the way.
The Columbia Spotted Frog has small spots all over their body that are often lighter on the inside.
The Northern Leopard Frog has fairly large spots all over their body. The dorsal ridge is nearly complete.
The Relict Leopard Frog hasn’t been seen in the state since the 50s so it is probably extinct but who knows. The dorsal folds on the frog end well before the groin. It also has shorter legs than the Northern Leopard Frog.
The Canyon Tree Frog lacks a stripe that runs through its eye.
Pacific Tree Frog has the stripe through its eye but none down its back.
The Boreal Chorus Frog has a stripe through its eye and three down its back.