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 …

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 …

Dec 10, 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 …

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 …

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

Apr 23, 2025 · Amphibians are tetrapod vertebrates belonging to the class Amphibia, characterized by their unique dual-life adaptation to both aquatic and terrestrial environments. …

Amphibians live part of their lives in water and part on land. They are vertebrates and are also ectothermic; they cannot regulate their own body heat, so they depend on sunlight to become …

Feb 28, 2025 · Named for their dual existence – they live partly in water, partly on land – amphibians are found on every continent except Antarctica and reside in a variety of habitats …

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 …