Drawing of idealised feathers in a bird's wing.
Original author: <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> in October 2006. Traced by <a href="//commons.wikimedia.org/wiki/User:Kjoonlee" title="User:Kjoonlee">User:Kjoonlee</a>.
<a href="//commons.wikimedia.org/wiki/User:Kjoonlee" title="User:Kjoonlee">User:Kjoonlee</a>'s tracing 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>'s file.