examples of amphibians 
There are about 4,000 species of amphibians divided into three main groups, depending on whether or not they have a tail and limbs.
Northern leopard frog
Tailless, mostly nocturnal amphibian with a spotted body that is covered with ridges; it lives mainly in North America.
Tailless amphibian found mostly in the woods of North America; it feeds on various small animals.
Squat tailless amphibian usually found on land, mostly in Europe; it feeds on various small animals.