They are placed in their own family known as Hylidae. It has dark stripes on its long hind legs. The Peeper has an amazing ability. The dark lines that form the cross on its back change to blotches which give a mottled effect and provide excellent camouflage. The Peeper sleeps during the day, and is very hard to spot clinging to the bark of a tree with its specially adapted toes.
All tree frogs are carnivores.
The Peepers dine primarily on small spiders or insects. Their tongues are fastened at the front of their mouths, not at the back as ours are. When they swallow, they blink, which presses their bulging eyes downward and helps push the food down from mouth to stomach. The surprisingly loud song of the tiny Peeper is produced by courting males. They enormously inflate their vocal sacs with air.