Bird

Birds are a group of warm-blooded vertebrate animals 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 (2.

2 in) bee hummingbird to the 2.
8 m common ostrich.
There are over 11,000 living species and they are split into 44 orders.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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Every species, image, fact, and figure is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.