Frogs have glandular skin, with secretions ranging from distasteful to toxic. Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from taxonomy or evolutionary history.Īn adult frog has a stout body, protruding eyes, anteriorly-attached tongue, limbs folded underneath, and no tail (the tail of tailed frogs is an extension of the male cloaca). They are also one of the five most diverse vertebrate orders. Frogs account for around 88% of extant amphibian species. Frogs are widely distributed, ranging from the tropics to subarctic regions, but the greatest concentration of species diversity is in tropical rainforest. The oldest fossil 'proto-frog' Triadobatrachus is known from the Early Triassic of Madagascar, but molecular clock dating suggests their split from other amphibians may extend further back to the Permian, 265 million years ago. Variegated golden frog ( Mantella baroni) in the Ranomafana National Park of MadagascarĪ frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (literally without tail in Ancient Greek).

Frog leap system for pools