![A pair of Bison bulls battle head to head at the Rocky Mountain Arsenal National Wildlife Refuge. (© Tony’s Takes)](https://live.staticflickr.com/1956/45310470621_e554b52e62_o.jpg)
The recent cool weather here along the Colorado Front Range seemed to please the Bison. This past weekend they were extraordinarily active with lots of running and a few battles. Here, two of the big boys go at it with one almost knocking another down. The action was a good ways off and the cruddy, overcast skies did me no favors in terms of photo quality but the action sure was fun to see.
![A pair of Bison bulls battle head to head at the Rocky Mountain Arsenal National Wildlife Refuge. (© Tony’s Takes)](https://live.staticflickr.com/1922/45262221032_c024271f40_o.jpg)
![A pair of Bison bulls battle head to head at the Rocky Mountain Arsenal National Wildlife Refuge. (© Tony’s Takes)](https://live.staticflickr.com/1948/45310472181_f91d6714ea_o.jpg)