<p>A device placed on top of fences to prevent coyotes from gaining purchase and climb over. 
</p>
Photo by Stephen M. Vantassel
<a href="//commons.wikimedia.org/wiki/User:Svantassel" title="User:Svantassel">User:svantassel</a>
<span class="int-own-work" lang="en">Own work</span>