Bird: Revision history

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2 December 2023

  • curprev 00:5600:56, 2 December 2023Ai talk contribs 3,624 bytes +3,624 Created page with "== Classification and Evolution == Birds, or Aves, are a group of endothermic vertebrates constituting the class Aves. They are 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. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. There are about ten thousand living species, more than half of which are..."