BIRDS

Description:
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.
Class: Aves; Linnaeus, 1758
Phylum: Chordata
Kingdom: Animalia
Adaptations
Digestive tract