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What Is an Amphibian?

Like birds, reptiles, mammals, and fishes,amphibians are vertebrates -- that is, creatures with a backbone and an internal skeleton.Amphibians live part of their life in water and part on land. Even those species that lay eggs on land start life in a fluid-filled egg, breathing through gills.

• Amphibians Defense
• Amphibians Diet
• Amphibians Families
• Amphibians Findings
• The World of Amphibians

Name	Type
American Bullfrog	Frogs and Toads
American Toad	Frogs and Toads
Barking Treefrog	Frogs and Toads
Bird-voiced Treefrog	Frogs and Toads
California Treefrog	Frogs and Toads
Cane Toad	Frogs and Toads
Cliff Chirping Frog	Frogs and Toads
Colorado River Toad	Frogs and Toads
Columbia Spotted Frog	Frogs and Toads
Couch's Spadefoot	Frogs and Toads
Eastern Narrow-mouthed Toad	Frogs and Toads
Eastern Spadefoot	Frogs and Toads
Foothill Yellow-legged Frog	Frogs and Toads
Gray Treefrog	Frogs and Toads
Great Basin Spadefoot	Frogs and Toads
Great Plains Toad	Frogs and Toads
Green Frog	Frogs and Toads
Green Toad	Frogs and Toads
Green Treefrog	Frogs and Toads
Greenhouse Frog	Frogs and Toads
Mountain Yellow-legged Frog	Frogs and Toads
Northern Cricket Frog	Frogs and Toads
Northern Leopard Frog	Frogs and Toads
Oak Toad	Frogs and Toads
Ornate Chorus Frog	Frogs and Toads
Pacific Treefrog	Frogs and Toads
Pine Woods Treefrog	Frogs and Toads
Plains Spadefoot	Frogs and Toads
Red-legged Frog	Frogs and Toads
Red-spotted Toad	Frogs and Toads
Southern Leopard Frog	Frogs and Toads
Southern Toad	Frogs and Toads
Spring Peeper	Frogs and Toads
Squirrel Treefrog	Frogs and Toads
Tailed Frog	Frogs and Toads
Texas Toad	Frogs and Toads
Western Spadefoot	Frogs and Toads
Western Toad	Frogs and Toads
Wood Frog	Frogs and Toads
Woodhouse's Toad	Frogs and Toads
Arboreal Salamander	Salamanders
California Giant Salamander	Salamanders
California Newt	Salamanders
California Slender Salamander	Salamanders
Dunn's Salamander	Salamanders
Dwarf Waterdog	Salamanders
Eastern Newt	Salamanders
Eastern Red-backed Salamander	Salamanders
Ensatina	Salamanders
Four-toed Salamander	Salamanders
Greater Siren	Salamanders
Green Salamander	Salamanders
Grotto Salamander	Salamanders
Hellbender	Salamanders
Larch Mountain Salamander	Salamanders
Lesser Siren	Salamanders
Long-tailed Salamander	Salamanders
Long-toed Salamander	Salamanders
Marbled Salamander	Salamanders
Mole Salamander	Salamanders
Mount Lyell Salamander	Salamanders
Mud Salamander	Salamanders
Mudpuppy	Salamanders
Northern Dusky Salamander	Salamanders
Northern Slimy Salamander	Salamanders
Pygmy Salamander	Salamanders
Red Salamander	Salamanders
Red-bellied Newt	Salamanders
Rough-skinned Newt	Salamanders
Seal Salamander	Salamanders
Spotted Salamander	Salamanders
Spring Salamander	Salamanders
Tiger Salamander	Salamanders
Two-toed Amphiuma	Salamanders
Yonahlossee Salamander	Salamanders

Most reptiles and amphibians... have lungs for breathing are cold-blooded give birth to young hatched from eggs

Reptiles and amphibians are "cold-blooded." This doesn't mean they have cold blood, but that they don't produce their own heat like mammals. They need to get heat from the sun to warm themselves. That's why you might see one lounging on a log near a pond or marsh. So what's the difference between reptiles and amphibians?

have dry, rough, scaly skin lay their eggs on or under dry ground begin their life cycle on land	have moist, smooth skin without scales lay eggs in water or in damp areas begin their life cycle in water and then, as adults, their bodies change to adapt to life on dry land