frog

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frog Tailless amphibian, found worldwide. Frogs have long hind limbs, webbed feet, and external eardrums behind the eyes. Most begin life as tadpoles after hatching from gelatinous eggs, usually laid in water. Some frogs remain aquatic, some terrestrial living in trees or underground. Most have teeth in the upper jaw and all have long sticky tongues attached at the front of the mouth to capture live food, usually insects. Length: 2.5–30cm (1–12in). Subclass Salientia (or Anura), divided into 17 families; the most typical genus is Rana. See also toad

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