Occurred on December 5, 2019 / Palmer Lake, Colorado, USA
Info from Licensor: "These are mule deer in the foothills of the Rocky Mountains at 7225 feet altitude. It is mating season and these big boys are battling for dominance. Hearing the antlers clacking is a rare sound for observers. At one point, the fight creates a fall into a dry creek bed. They both recovered and continued the battle. This went on for about 15 minutes."