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  1. Bird

    Class of vertebrates characterized by wings, a feather-covered body and a beak

    Birds 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. Birds live worldwide and range in size from the 5.5 cm bee hummingbird to the 2.8 m common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Wikipedia

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  3. britannica.com

    1 day agobird, (class Aves), any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from all other animals.A more-elaborate definition would note that they are warm-blooded vertebrates more related to reptiles than to mammals and that they have a four-chambered heart (as do mammals), forelimbs modified into wings (a trait shared with bats ...
  4. en.wikipedia.org

    The northern cardinal is the state bird of Ohio.. This list of birds of Ohio includes species documented in the U.S. state of Ohio and accepted by Ohio Bird Records Committee (OBRC). As of November 2024, there were 451 species on the official list. [1] Of them, 193 have been documented as breeding in the state, [2] and 125 are review species as defined below. [3]
  5. sciencenotes.org

    Apr 2, 2024Interesting Bird Facts. Superb Memory: Crows and other corvids are remarkably intelligent. They recognize individual human faces and remember them for years. Tool Use: Some bird species, like the New Caledonian crow, use and even craft tools to aid in food gathering, demonstrating complex problem-solving abilities.
  6. animalfact.com

    Jul 9, 2024When the bird inhales air, most of it bypasses the lungs and flows straight into the air sacs, filling the bones with sufficient air. On exhalation, the used air moves out of the lungs while the air stored in the posterior sacs is forced into the lungs, thus ensuring a constant supply of fresh air. Digestive

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