YELLOWSTONE NATIONAL PARK, USA: When a bison bull wallows, he rolls in the dirt in order to scratch places that cannot be reached. THE TERRIFYING moment a one tonne Great bison bull forced a hapless physician to flee and abandon his photographic gear has been captured. Another image shows the spirited animal rolling around vigorously in the dust and dirt of Yellowstone National Park scratching an itch that just couldn’t be reached. Willis Chung /

---

Size: 5194px × 3463px
Photo credit: © Media Drum World / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: america, bison, bull, conservation, dangerous, national, nature, park, photography, wilderness, wildlife, yellowstone