Birds are a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked
jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight
skeleton. Birds live worldwide and range in size from the 5 cm bee hummingbird to the 2.75 m ostrich.
There are about ten thousand living species.
Learn more about different types of birds.
This website was coded by Lien Van Rampelberg