A rather sizable bison uses a tree as a scratching post at the Rocky Mountain Arsenal National Wildlife Refuge. The last couple times I have been out there the herd was in an area to the north of the refuge that is closed to the public. Today there were a couple in the public area thankfully.
![A bison uses a tree as a scratching post at the Rocky Mountain Arsenal National Wildlife Refuge. (© Tony’s Takes)](http://lh3.googleusercontent.com/-EcXkkDgK5Ow/VE17P_MFT9I/AAAAAAAAE9o/yPomAx63EVU/s710/2014-10-26%2B09-17-37%2B-%2B0042.jpg)