Feather, Flight, Structure, Function

Feather, the component structure of the outer covering and flight surfaces of all modern birds. Unique to birds, feathers apparently evolved from the scales of birds’ reptilian ancestors. The many different types of feathers are variously specialized for insulation, flight, formation of body

Different Types of Bird Feathers - Bird Watching Academy

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Owl plumage condition. (A) Flight feathers dirty and greasy. (B) Left

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