Some kinds of frogs can jump distances up to 20 times their own body length in a single leap. When disturbed, frogs often jump into a puddle or pond where they can hide underwater. Their erratic zig-zag jumping on land also serves to confuse potential predators. In most frog species only the males croak. They croak to attract female frogs for breeding, and to warn away other male frogs from their territory.
Female frogs think croaking is very sexy.
Many kinds of frogs puff themselves up enormously with air when they croak. This amplifies the sounds made by the frog's vocal chords, kind of like how the stretched membrane of a drum works. Most frogs and toads need to lay their eggs in water. Each female lays thousands of eggs at a time, in strings or slimy masses. The eggs hatch into tadpoles, which are very different from adult frogs.