This is one of the many small den sites we found in a few days during Spring of 2010, and this was a typical site. In the middle of the rocks are just a pile of very large rattlesnakes. This trip was my first time experiencing timber rattlesnakes at all, to see them just laying around in piles was a great way to let that happen. Here are a few photos.
![](http://fieldherper.com/wp-content/uploads/2011/11/C-horridus-15-051411-800x569.jpg)
![](http://fieldherper.com/wp-content/uploads/2011/11/C-horridus-16-051411-800x569.jpg)
![](http://fieldherper.com/wp-content/uploads/2011/11/C-horridus-17-051411-800x569.jpg)
Tags: Crotalus, den, densite, hibernate, horridus, pennsylvania, snake den, timber rattlesnake