Amphibians of Olympic National Park
Adams MJ and Bury RB. 2000. Amphibians of Olympic National Park. USGS. Corvallis, OR
Amphibians evolved from fishes about 360 million years ago and were the first vertebrates adapted to life on land. The word amphibian means "double life." It refers to the life history of many amphibians, which spend part of their life in water and part on land. There are three major groups of amphibians: salamanders, frogs and toads, and caecilians. Salamanders, frogs, and toads can be found in Olympic National Park (ONP), but caecilians live only in tropical regions. Most amphibians are generalist predators, eating almost any prey they can fit into their mouths.