The period known as the age of amphibians is the Late Paleozoic Era, specifically during the Carboniferous and Permian periods, which lasted from about 359 to 252 million years ago.
During this time, amphibians were the dominant vertebrates on land, evolving from fish ancestors. The Carboniferous period, in particular, is marked by the diversification and proliferation of amphibious life forms, as they adapted to life both in water and on land. The warm, humid climate of this era provided the perfect conditions for lush vegetation, which in turn supported a wide variety of amphibian species.
As the Permian period progressed, amphibians continued to thrive, although they began to face increased competition from the early ancestors of reptiles. The age of amphibians came to an end with the mass extinction at the end of the Permian, which significantly reduced their populations and allowed reptiles to become the dominant terrestrial vertebrates in the Mesozoic Era that followed.