Feather

Feather Feather Body-covering structure of birds For other uses, see Feather (disambiguation). Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates[1][2] and an example of a complex evolutionary novelty.[3] They are among the characteristics that distinguish the extant birds from other living groups.[4] Feather variations Although feathers cover most of the bird's body, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, and waterproofing. In addition, coloration helps in communication and protection.[5] The study of feathers is called plumology (or plumage science).[6][7] People use feathers in many ways that…

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