5 Vertebrate Groups

Fishes: The first fishes are thought to have emerged some 518 million years ago during the Cambrian Period of Earth’s history.

Amphibians: Amphibians evolved from fully aquatic tetrapods who descended from lobe-finned fish—sometime.

Reptiles: Reptiles are air-breathing vertebrates.

Birds: Birds make up any of the 9,600 living species unique in having feathers, the major characteristic that distinguishes them from all other animals.

Mammals: There are approximately 5,000 species of mammals living today.

Click Here