gfdgfd gfd gdfgfdbfd b fgbfdBirds are a group of warm-blooded vertebrates constituting the
class Aves, characterised by feathers, toothless beaked jaws, the laying
of hard-shelled eggs, a high metabolic rate, a four-chambered heart,
and a strong yet lightweight skeletonBirds are a group of warm-blooded vertebrates constituting the
class Aves, characterised 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