Ariel Celeste is a wildlife photographer in the remote mountains of western Wyoming. Along with stunning still images, her YouTube channel is one of the most popular in the state, with over one million views to date.

Her latest video could be the best yet. The clip chronicles the final weeks of Moose Rut Season in the Tetons.

During the fall, bull moose come down from higher elevations to find potential mates. While dominate males battle for territory and breeding rights, many smaller and younger bulls prepare for future fights by playfully sparring with each other.

Had there been a female in the area when this video was filmed, the competition would have been fierce. According to the National Park Service, adult bulls often weigh over 1,600 pounds. During the rut, their necks expand to nearly twice their normal size. While the thick skin on their heads and antlers can protect them, many mature moose will risk death for the chance to mate.