Timber rattlesnake (Crotalus horridus)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/11304433@N00">Tad Arensmeier</a> from St. Louis, MO, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/11304433@N00/484186958/">Timber Rattlesnake</a>