Once frogs mature, they have more predators on the land, such as snakes, bullfrogs, birds, fishes, turtles, crocodiles, and small mammals. Perhaps the worst problem frogs face is pollution, because frogs skin absorb everything that they come in contact with. They spend a lot of time beneath rocks, logs, in crevices or buried in the soil. They also have excellent camouflage, using both colour and texture to blend with their surroundings. Some frogs even have appendages to help alter their shape, such as the family Hemiphractus, which have fleshy horns above their eyes.
Frogs can also leap away when provoked.
Some emit a loud screech and others play dead. Some frogs also secrete a toxic or distasteful substance from their skin. Tadpoles eat algae, tiny pond creatures and the corpses of fish and adult frogs. Once on land, a frog becomes completely carnivorous, eating slugs, snails, worms, beetles, flies, moths, woodlice, and some frogs eat other frogs. Frogs vary greatly in natural colours, from the bright green, White s tree frog, Litoria caerulea , to the blue poison dart frog, Dendrobates azureus .