Amphibia

class of tetrapods, whose living forms include frogs, toads, salamanders, newts and caecilians Amphibians (Amphibia) is a class of organisms united by key anatomical and physiological traits. It contains 4 orders with 1,817 known species. This includes the order groups Frogs & Toads, Caudata, Caecilian, and Salamanders. Among its members, 756 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Chordates (Chordata).