Tree frogs

Nature has provided some crafty little defense mechanisms for amphibians to protect themselves against predators. While amphibians may not have special weapons like claws or sharp teeth to defend themselves, they do have slippery, quick moving bodies and a very shy, quiet nature. This may not seem like much of a defense, but don't be fooled. These are beautiful, resiliant creatures that have survived a very long time on this planet

As another form of protection, many amphibians don't show themselves in the light of day. They also have other survival tricks involving an attribute known as Coloration. There are several types:
Flash Coloration
Warning Coloration
Protective Coloration

Flash Coloration is different from Warning Coloration, because it is not seen until the amphibian is under attack. Their bright colors often times distract and confuse predators, thus help the amphibians escape. Changing skin coloration is employed by frogs, toads, and some salamanders.

Predators who attack a brightly colored amphibian quickly learn to avoid similar-looking ones in the future. Protective Coloration is important to many amphibians, a large number of which are green, brown, or gray colors that are common in nature. These color patterns act as camouflage, helping amphibians blend in with their surroundings

Treefrogs and other color-change artists change their colors over time to match the background they rest upon. Some amphibians produce mild skin poisons, and others produce toxic secretions strong enough to kill predators, like the Poison-arrow frog.