Fossil evidence suggests that feathers existed prior to the development of a flight-capable skeleton; because these feathered animals could not fly,biologists suspect that the initial adaptive value for feathers was related their ability to

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Fossil evidence suggests that feathers existed before flight, indicating that the initial adaptive value of feathers was not related to flight but to serving as insulation. Feathers would have provided warmth and allowed for better regulation of body temperature, making them an advantageous adaptation.

Fossil Evidence Suggests That Feathers Existed Prior to the Development