Serrated claw on the middle toe of a <a href="https://en.wikipedia.org/wiki/Grey_Heron" class="extiw" title="w:Grey Heron">Grey Heron</a> (<i>Ardea cinerea</i>)
<a href="//commons.wikimedia.org/wiki/User:Donkey_shot" title="User:Donkey shot">Donkey shot</a> (Christof Bobzin)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>