What traits define the White-crowned Sparrow's placement in Class Aves?
Answer
Warm-blooded, possessing feathers, a beak without teeth, and laying hard-shelled eggs.
Classification into the Class Aves is determined by a specific suite of physiological and structural characteristics essential for an avian lifestyle. These defining features include being warm-blooded, which allows for sustained high metabolic rates, the unique presence of feathers used for insulation and flight, having a beak structure devoid of teeth, and the reproductive necessity of laying hard-shelled eggs. These features distinguish birds from other chordates like amphibians or reptiles.
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