Amphibians are cold-blooded vertebrates that typically live part of their lives in water and part on land. They include animals such as frogs, toads, salamanders, and newts. All extant amphibians belong to the monophyletic subclass Lissamphibia, with three living orders: Anura (frogs), Urodela (salamanders), and Gymnophiona (caecilians)
. Amphibians are known for their unique life cycle, starting as aquatic larvae with gills and then transforming into adults that live on land
. They are extremely susceptible to environmental threats due to their porous eggs and are considered the most threatened class of animals in nature
