Top 10 Most Beautiful Birds
Birds are a group of warm-blooded vertebrates constituting the class Aves (/ˈeɪviːz/), 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 (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are about ten thousand living species, more than half of which 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. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming.
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Aan1506
1 year agoTOP 10 Most Beautiful Birds on Planet Earth #2
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hablaho animal
6 months agoTop 10 most beautiful birds in the world
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Mister Zafar
1 year agoدنیا کے 10 خوبصورت پرندے | Top 10 Beautiful Birds
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Moussa64
2 years agoTop Birds 2021
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zeynijnr
2 years agoBeautiful birds
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exoticbirds
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dannerjm
7 months agoBeautiful Birds
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AP DIGITAL AND GADGETS
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ECA Fun & Creative Content
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Birds in nature
3 years agoBeautiful and wonderful birds
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