Birds
Definition of Birds Hierarchical Category as it relates to Animals, Amphibians, Arthropods, Arthropoda
"Birds" refers to a class of warm-blooded vertebrates constituting the group Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and strong yet lightweight skeleton. They are part of the larger animal kingdom, which includes Arthropoda, the phylum that comprises invertebrates such as insects and crustaceans (arthropods), and Amphibians, a group of cold-blooded vertebrates such as frogs and salamanders. Thus, the category "Birds" encompasses all members of the Aves class, but also shares connections with other major groups within the animal kingdom.