Amphibian

Amphibians is ectothermic, tetrapod vertebrates i the cless Amphibia (Greek ἀμφí, amphi, "baith" + βíος, bios, "life"). Thay bide in sindry habitats wi maist species livin athin terrestrial, fossorial, arboreal or freshwatter aquatic ecosystems.

Amphibians Temporal range: Late Devonian–present, 370–0 Ma PreЄ Є O S D C P T J K Pg N
Clockwise frae tap right: Seymouria, Mexican burraein caecilian, eastren newt an leaf green tree frog
Scientific classification
Kinrick:	Animalia
Phylum:	Chordata
Clade:	Batrachomorpha
Cless:	Amphibia Gray 1825[1]
Subclasses
†Temnospondyli Lissamphibia (modren amphibians)

The warld's smawest kent vertebrate, Paedophryne amauensis, sittin on a U.S. dime, 17.9 mm, for scale