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Amphibians are cold-blooded, smooth-skinned vertebrates. Most live some of their life in water and some on land. The most common amphibian critter is a frog but there are many others.

    Amphibian
    American bullfrog half in water
    Learn more about the American Bullfrog.
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    American Toad
    Learn facts about the American Toad.
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    Blanchard's cricket frog in the mud
    Learn more about the Blanchard's Cricket Frog.
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    Blue-spotted salamander on a rock
    This colorful critter is one of three Wisconsin species of mole salamanders.
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    Cope's Gray Tree frog hanging on to a leaf
    There aren't many differences between this and the gray treefrog.
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    Eastern Newt
    These critters can go through three phases beyond the larval stage.
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    Red-backed Salamander
    Not only does it live on land its whole life, it doesn't have lungs or gills and breathes right through its skin!
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    Eastern Tiger Salamander
    This salamander is the world's-largest land-dwelling salamander.
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    Four-toed Salamander
    The four-toed salamander is called the four-toed salamander because it has four toes on its hind feet.
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    Gray Treefrog
    Learn more about the Gray Treefrog
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    Green Frog
    Learn more about the Green Frog.
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    Mink Frog, Image Credit: Bob Hay
    Learn more about the Mink Frog.
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    Mudpuppy, Image Credit: Ohio DNR
    Also known as Waterdog(Necturus maculosus)
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    Leopard Frog
    Learn more about the Leopard Frog.
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    Pickerel Frog
    Learn more about the Pickerel Frog.
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    Spotted Salamander
    This black or dark brown salamander (another of the mole salamanders) has prominent yellow spots along its body.
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    Spring Peeper
    Learn more about the Spring Peeper Frog.
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    Wood Frog
    Learn more about the Wood Frog.
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    At a Glance