As a wiping frog uses its feet to massage its body, the stimulation produces a nerve reflex that causes muscle cells to contract around glands in the skin. This triggers special glands to produce a protective wax.
Frog skin contains glands that produce various substances. Mucous glands release a fluid that keeps the skin moist and healthy. Poison glands (also called granular glands) release toxic substances that keep predators away. It turns out that the Chacoan monkey frog has another type of gland that most frogs don't have: a specialized gland that produces lipids, or waxes. The frog wipes these waxes over every part of its body, and when the lipids dry, the frog looks like it's made of plastic. "That lipid barrier is almost like a wax coat you'd put on your car," Barbeau says. "You wax your car to keep water out. These frogs are waxing their bodies to keep water in."
The Chacoan monkey frog may be the frog prince of water conservation, but a few other tree frogs can wax themselves without a specialized lipid-producing gland. Two species of Australian tree frogs and seven species of Florida tree frogs secrete waxes from their poison glands; but these frogs' coverings aren't as waterproof as the Chacoan monkey frog's wax coat. One possible reason: The waxes in their coverings are mixed with other substances produced in the glands, diluting the waxes. And unlike the Chacoan monkey frog, which wipes its entire body, the Florida frogs never wipe their bellies. Instead, these frogs protect their stomachs from water loss by shielding them from the desert air. "When they settle down, they tuck their legs and arms in tight against their bodies, and press their bellies as close as possible to the surface they're on."
There are many different types of frogs, they are all unique and special in there own way. This is just an example of a few..
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