Design based on:<a class="external free" href="https://commons.m.wikimedia.org/wiki/File:Biberschaedel-drawing.jpg">https://commons.m.wikimedia.org/wiki/File:Biberschaedel-drawing.jpg</a>
<a href="//commons.wikimedia.org/w/index.php?title=User:TakisA1&amp;action=edit&amp;redlink=1" class="new" title="User:TakisA1 (page does not exist)">TakisA1</a>
<span class="int-own-work" lang="en">Own work</span>