Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, but excluding …

Dec 19, 2025 · amphibian, (class Amphibia), any member of the group of vertebrate animals characterized by their ability to exploit both aquatic and terrestrial habitats.

Amphibians are small vertebrates that need water, or a moist environment, to survive. The species in this group include frogs, toads, salamanders, and newts. All can breathe and absorb water...

Mar 13, 2024 · Amphibians are ectothermic (cold-blooded) vertebrates that belong to the Class Amphibia. A defining characteristics is their ability to live both in aquatic and terrestrial environments.

Explore facts and photos about amphibians found in the United States. Learn about their range, habitat, diet, life history, and more.

Dec 30, 2025 · Amphibians are a group of cold-blooded tetrapods (four-limbed vertebrates), except those with an amniotic membrane (the amniotes). They are a paraphyletic group belonging to the …

Feb 6, 2025 · Amphibians are a class of vertebrates that include frogs, toads, salamanders, and newts. They are unique for their ability to live both in water and on land. Amphibians typically undergo …

Populations of frogs appear to be declining in many parts of the world due to habitat loss, global climate change, and the spread of disease.

Amphibians are cold-blooded, vertebrate animals that have an aquatic phase of life (spent in water, breathing through gills) and a terrestrial phase of life (living on land, breathing with lungs).

Amphibians are cold-blooded vertebrates belonging to the class Amphibia, including all frogs, toads, salamanders, newts, and caecilians. They spend part of their lives in water and the rest mostly on land.