Birds

in different •  7 years ago 

Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws,

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the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart,

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and a strong yet lightweight skeleton.

download (1).jpg

different birds
7 years ago by

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      ·  7 years ago 

    beautiful

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        ·  7 years ago 

      nice

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