Defining Characteristics:
-Vertebrates
-Cold blooded (ectotherm)-depend on warmth from sunlight to become warm and active
-Smooth Skin
-Young have gills for breathing underwater. Adults have lungs for breathing air. –Lay eggs Live part of their lives in water and part on land
-Metamorphosis – as they develop, young change in body shape, diet, and lifestyle

Fun Facts:
-Number of Species: Over 5,500
-3 main groups 1) salamanders and newts, 2) caecilians, 3) frogs and toads