Occurred on September 27, 2017 / Blue River, Colorado, USA
Info from Licensor: "I typically have a moose family roaming my property. I was on my deck and saw a mother her baby and a bull in my backyard eating willow tree leaves. A few minutes later, a larger bull approached the area where the other bull was and the fight ensued. It was very exciting! I thought they were going to damage my deck, but luckily they didn’t. The larger bull won and the smaller bull retreated and left."