Aquatic and Land Animal Diversity

Reptiles and Birds

What is the most successful and diverse group of terrestrial vertebrates?

Birds, members of the class Aves, are the most successful of all terrestrial vertebrates. Twenty-eight orders of living birds with almost 10,000 species are distributed over almost the entire Earth. The success of birds is mostly due to the development of the feather, providing insulation from the cold, allowing them to fly, and as protective coloration, not only as camouflage, but for territorial displays for mating.


This is a web preview of the "The Handy Biology Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App