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Large rigid feather of the wings and tail enabling flight.

See contour feather in : french | spanish

Opening of the shaft located at the lower portion of the calamus; it is implanted in the skin.

Opening of the shaft located at the juncture of the calamus and the rachis.

Each of the self-adhering filaments implanted on each side of the rachis.

Solid corneous upper portion of the shaft of the contour feather; it is an extension of the calamus and the barbs are attached to it.

Hollow corneous anterior portion of the shaft of the contour feather extending through the rachis.

Small soft light feathers usually located at the base of the main feathers on the abdomen; they help to insulate the body.

All the interconnected barbs on the same side of the rachis forming a waterproof surface.