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 . Some frogs, such as the gray tree frog, Hyla versicolor , can adjust their colour according to changes in light, moisture, chemicals and temperature. Frogs must breed in water, be it a pond, lake, marsh or in puddles after a heavy rain. The eggs are commonly laid in water, or less commonly, beneath logs, in moss, bromeliads, or on leaves.