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.
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 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 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.
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.
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.
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.
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 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.
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.
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.
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.