These are two sub-adult (3 year old) Grizzly bears in the Hayden Valley of Yellowstone National Park. I set up from the road, hoping the bears would stop on this snow bank for a moment. To my surprise they stayed and wrestled for more than five minutes, providing many photo ops. The shot was taken with a Canon 5D mk 3 with a 500mm f/4 and 1.4 T.C. mounted on a gitzo tripod with a wimberly II head.