Frogs by State

Frogs and Toads of Maine

Frogs and Toads of Maine

Maine only has one toad species and a few frogs that fall into the tree frog and true frog families.


Tree Frog Family – Hylidae

Spring Peeper (Pseudacris crucifer)

The Spring Peeper is very small in size compared to the only other tree frog species in Maine, the Gray Tree frog. The distinguishable feature of the Spring Peeper is the x on its back.

Gray Tree Frog (Hyla veriscolor)


The Gray Tree Frog does not posses an x on its back so it can be easily identified if you can tell its a tree frog.

True Frog – Ranidae

Northern Leopard Frog (Lithobates pipiens)
Pickeral Frog (Lithobates palustris)

Northern Leopard Frog and Pickeral Frog look similar to each other but the Northern Leopard Frog has round spots while the Pickeral Frog have more square shaped spots. The Northern Leopard Frog is a special concern species in the state of Maine.

 American Bullfrog (Lithobates catesbeianus)


The American Bullfrog is the largest frog in Maine. It can be identified by its lack of dorsal ridge.

Wood Frog (Lithobates sylvaticus)

The Wood Frog is easily identified by dark stripes on its face and brownish red color.

Mink Frog (Lithobates septrentionalis)

The Mink Frog is very similiar to the Green Frog or American Bullfrog but the coloration on it is much different and has more black in it.

Green Frog (Lithobates clamitan)



The Green Frog is often confused with the American Bullfrog but its smaller and it has a dorsal ridge.

True Toad Family – Bufonidae

American Toad (Anaxyrus americanus)

The American Toad is the only toad species in Maine.


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