+A feather is a delicate, keratinous outgrowth forming the outer covering of a [Bird](/wiki/bird). Essential for [Flight](/wiki/flight), insulation, and display, feathers are a marvel of natural engineering.
+## See also
+- [Keratin](/wiki/keratin)
+- [Plumage](/wiki/plumage)
+- [Molting](/wiki/molting)
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