Birds
Definition of Birds Hierarchical Category as it relates to Animals, Arachnids, Primates
A diverse group of endothermic vertebrates constituting the class Aves, distinguished by their ability to fly, feathers, a beak with no teeth, the laying of hard-shelled eggs, and a high metabolic rate. They are a subset within the broader categories of animals and primates, and share certain ecological interactions with arachnids.