Wisconsin provides a wide range of forested and aquatic habitats, which are suitable for frog and toads. These amphibian species are cold-blooded, meaning they require outside warmth to heat their bodies. Late spring through early fall are the primary months frogs and toads are active in Wisconsin. Organizations such as the Wisconsin Department of Natural Resources and U.S. Fish and Wildlife Service monitor the frog and toad populations for conservation reasons.
The mink frog is native to the North Woods region of Wisconsin. This frog receives its moniker from the scent it emits when a predator scratches or rubs its skin; the mink frog's odor smells like rotten onions, according to the U.S. Geological Survey. Mink frogs have dark brown skin with a series of black blotches and spots on their body. These type of frogs are usually found in aquatic habitats, such as ponds, lakes and streams.
The wood frog is the second-most distributed frog in the United States, according to the U.S. Forestry Service. These frogs are found in nearly 10.5 million acres in the United States. In Wisconsin, wood frogs are found in deciduous forest habitats and throughout the entire state. This frog species has black or brown skin on the upper part of its body, while its belly has white skin.
Northern Leopard Frog
The northern leopard frog is a brown frog with black spots, which have a similar appearance to leopard cats. This frog's range covers the entire state of Wisconsin. Northern leopard frogs are typically found in wetland habitats, including ponds, rivers and lakes. As adults, this frog species grows to 2 to 4 inches in length. This frog's diet largely consists of invertebrates when they are adults. However, in their larvae stage, northern leopard frogs are known to eat algae.
Eastern American Toad
Eastern American toads are found in states throughout the Great Lakes region, including Wisconsin. These toads live in aquatic and dry land habitats, such as grasslands, prairies and forested regions. Eastern American toads have varying skin coloration, including red, brown, gray and olive. The top part of an eastern American toad's body features a series of warts. A similar toad species, Fowler's toad, are known to interbreed with eastern American toads.
One of the largest frog species is the American bullfrog. This frog's length ranges from 7 to 10 inches as adults. In Wisconsin, American bullfrogs occur in the southern and northeastern regions of the state. These types of frogs prefer aquatic habitats and live in ponds, streams and lakes. American bullfrogs are usually seen in the late spring and summer, when temperatures are warmer. The Wisconsin Department of Natural Resources has given the American bullfrog a Special Concern conservation status.
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