<a href="https://en.wikipedia.org/wiki/Signal_Crayfish" class="extiw" title="en:Signal Crayfish">Signal Crayfish (<i>Pacifastacus leniusculus</i>)</a>. <a href="https://en.wikipedia.org/wiki/Arlanza_river" class="extiw" title="en:Arlanza river">River Arlanza</a>, near <a href="https://en.wikipedia.org/wiki/Santo_Domingo_de_Silos" class="extiw" title="en:Santo Domingo de Silos">Santo Domingo de Silos</a>, <a href="https://en.wikipedia.org/wiki/Province_of_Burgos" class="extiw" title="en:Province of Burgos">Burgos</a> <a href="https://en.wikipedia.org/wiki/Spain" class="extiw" title="en:Spain">(Spain)</a>.
<a href="//commons.wikimedia.org/wiki/User:David_Perez" title="User:David Perez">David Perez</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>