Frogs by State

Frogs and Toads of Wisconsin

Frogs and Toads of Wisconsin

Wisconsin is home to a small variety of frogs and just one toad.


There are 11 frog species found in Wisconsin. They are from 2 families, Ranidae – true frogs and Hylidae – tree frogs.

Tree Frog Family – Hylidae

Eastern Gray Tree Frog (Hyla veriscolor) and Copes Gray Tree Frog (Hyla chrysoscelis)

These two frogs are identical besides their calls and chromosome numbers. These tree frogs are also larger than the ones below. Also note that Gray Tree Frogs are not always gray and can be green.

Here is my video of some Eastern Gray Tree Frog callin

Spring Peeper (Pseudacris crucifer)

Spring Peeper is a frog that most people have heard during the early spring. They can be distinguished from Boreal Chorus Frog and Cricket Frog with their x on their back.

Boreal Chorus Frog (Pseudacris maculata)

Boreal Chorus Frog is very similar to the Spring Peeper but there is no x on its back but lines. It is one of the first frogs to start breeding in the spring, once the ice melts from the ponds.

Northern Cricket Frog (Acris crepitans)

The Northern Cricket Frog is an endangered species in Wisconsin. They have no x or stripes on their back which separates them for the Spring Peeper and Boreal Chorus Frog. They are found in the Southern half of the state.

True Frog Family – Ranidae

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Green Frog (Lithobates clamitans)

The Green Frog is probably the most common frog in Wisconsin. Best way to tell them apart from other true frogs below is the dorsal ridge on its back does not go all the way down its back.

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American Bullfrog (Lithobates catesbeianus)

American Bullfrog is the largest frog in Wisconsin. They are very similar to Green Frogs but they don’t have a dorsal ridge down their back. It wraps around their tympanum.

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Wood Frog (Lithobates sylvaticus)

The Wood Frog is the easiest true frog to identify in Wisconsin. They vary in color from brown, silver, or red and they have dark “raccoon” eyes. They start to breed once the ice is off the ponds in late March / early April.

Mink Frog (Lithobates septrentionalis)

Mink Frog has a marbled look to it compared to the other frogs. They are listed as a special concern species in Wisconsin. They are also found in Northern Wisconsin.

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Northern Leopard Frog (Lithobates pipiens)

The Northern Leopard Frog varies in color from dark brown to slim green. They are found throughout Wisconsin but are becoming harder to find. Breeding takes place in April to June.

Pickeral Frog (Lithobates palustris)

The Pickeral Frog and Northern Leopard Frog look very similar to each other because of the spots but the Pickeral frog’s spots are more rectangular than the Northern Leopard Frog.

True Toad Family – Bufonidae

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American Toad (Anaxyrus americanus)

The American Toad is the only toad found in Wisconsin. It is found throughout the state. They are poisonous but can be held by people. Try not to let your dogs eat them or your dogs could become ill.


5 thoughts on “Frogs and Toads of Wisconsin”

  1. silver frog with black marks in berlin wi. if the frog had been on an Oakland raiders helmet he would have been invisible, that’s the silver color of this frog. is he a grey tree frog? thank you!

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