Frogs have very special skin! They don't just wear it, they drink and breathe through it. Frogs don't usually swallow water like we do. Instead they absorb most of the moisture they need through their skin.
Sometimes you'll find frogs that are slimy. This is because the frog skin secretes a mucus that helps keep it moist. Even with the slimy skin, these frogs need to stay near water. Toads on the other hand have tougher skin that doesn't dry out as fast, so they can live farther from water than most frogs.
Frogs shed their skin regularly to keep it healthy. Some frogs shed their skin weekly, others as often as every day! This looks pretty yucky...they start to twist and turn and act like they have the hiccups. They do this to stretch themselves out of their old skin! Finally, the frog pulls the skin off over it's head, like a sweater, and then (this is gross) the frog eats it!
For more info, please visit Allaboutfrogs.
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