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Tuvalu Bird James Audubon Flower Serie Set of 6 Stamps Mint NH Papyrus Renowned as the "Father ofTuvalu Bird James Audubon Flower Serie Set of 6 Stamps Mint NH Birds, also known as Aves, are a group of endothermic vertebrates, 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. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2. 75 m (9 ft) ostrich. They rank as the world's most numerically