Sketch of the wing feathers of a bird.
<a href="//commons.wikimedia.org/wiki/User:Erfil" title="User:Erfil">Erfil</a> based on the work of <a href="//commons.wikimedia.org/w/index.php?title=User:Muriel_Gottrop&amp;action=edit&amp;redlink=1" class="new" title="User:Muriel Gottrop (page does not exist)">Muriel Gottrop</a>
Own work based on <a href="//commons.wikimedia.org/wiki/File:BirdWingFeatherSketch.svg" title="File:BirdWingFeatherSketch.svg">File:BirdWingFeatherSketch.svg</a>