About this document
Birds in Phylum Chordata Overview by Jerome Jeremias is a document available to read on EtoBox.
Birds are the second most abundant group of vertebrates after fish, with over 9,700 species. They range greatly in size, from the 1.8 gram bee hummingbird to the extinct elephant bird that was over 2 meters tall and weighed 450 kilograms. Feathers evolved from scales in dinosaurs and the earliest bird, Archaeopteryx, had teeth, a long tail, and claws but also had feathers. Modern birds are adapted for flight with lightweight skeletons, feathers that cover their bodies and aid in flight, and specialized flig
- Author
- Jerome Jeremias
- Language
- EN