Aves

class of vertebrates characterized by wings, a feather-covered body and a beak Birds (Aves) is a class of organisms united by key anatomical and physiological traits. It contains 42 orders with 10,159 known species. Key order groups include Hawks & Eagles, Anseriformes, Apodiformes, Apterygiformes, Bucerotiformes, and Caprimulgiformes. Among its members, 1,302 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). Well-known representatives include American Bald Eagle, and Emperor Penguin. It belongs to Chordates (Chordata).