The order Caudata, salamanders, and newts; Anura, frogs and toads; and apoda, legless caecillians. Amphibians belong to subphylum vertebrae of the Chordata phylum. They are cold-blooded, which means they have no control over their body temperature, and they are dependent upon the temperature of their surroundings to keep them warm.
Their term, ‘Anura' means the absence of tail; which implies that the species belonging to this class lacks a tail, which is the largest group out of the three. Species of this order are four-legged and sometimes vocal. The term Caudata has been derived from the Latin word cauda, meaning tail, which implies that the species under this amphibian category are tailed species. This characteristic differentiates these amphibian species from those under the order Anura.