Prospective visitors to Yellowstone National Park are reminded that the bison rut is underway through August, and to treat the colossal beasts with extra caution.

Everyone knows that bison are massive and can weigh 2,000 pounds. Many are also aware (some painfully) that bison are surprisingly agile for their size. But during mating season the iconic critters, sometimes referred to as buffalo, are particularly ornery.

Yellowstone bison clears rival from highway.

Yellowstone bison clears rival from highway.

To illustrate this point, and to showcase the strength of adult male bison, we’re sharing footage originally posted by Yellowstone in August 2020. It shows a male bison head-butting a rival bison off its feet to clear the animal from its prospective mating partners.

(If the video player does not appear below, please click on this link.)

This article originally appeared on For The Win: Yellowstone bison fight showcases awesome power of beasts during rut