Please view large so you can observe the fur flying and the eye of the second bison below the first. Neither bison seemed injured after this impact and the weaker male yielded the field and females to the stronger bull.
Yellowstone National Park
Canon DSLR camera, Canon 500mm IS L Lens, Tripod with Ballhead Mount. For discussion of shutter speed, f-stop, available light, and my technique, please visit my profile page…thank you :-)