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Key terms: arise barb been suggested been used birds bristles calamus carotenoid colors contour feathers differences dinosaurs eagle evolution evolved feather lice feathered dinosaurs feathers fish flight follicle functions grow hollow host indian peacock integumentary melanin parrots pigments plumage powder rachis regions scale selection serve shaft skin species structures suggested tail thermal insulation tracts united states waterproofing Search external links cited by footnotes on Wikipedia page Feather: |
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