A feather is a thick and elongated keratin structure consisting of a shaft that is highly branched and formed in the skin of modern birds.

A feather is a thick and elongated keratin structure consisting of a shaft that is highly branched and formed in the skin of modern birds.

Photo by knol

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Stock photo: A feather is a thick and elongated keratin structure consisting of a shaft that is highly branched and formed in the skin of modern birds. was taken by knol .