In general, frogs have protruding eyes, no tail, and strong, webbed hind feet that are adapted for leaping and swimming. They also possess smooth, moist skins. Many are predominantly aquatic, but some live on land, in burrows, or in trees. A number depart from the typical form. Frogs are a diverse group of tailless amphibians. Their unique features include a stout, tailless body, anteriorly placed tongue, protruding eyes, etc.
Source: https://support.google.com/voice/thread/306066438?hl=en&sjid=15553429193051263162-AP
