Jayhawker, many, many thanks for sharing those images. I am one who counts it a great night when I have dreamt of the buffalo. The incredible brute strength in the flanks of those two bulls is the raw power of creation, contending head to head for the critical right to pass on DNA. It is not life and death for the two actors, but it does mean life and death in the long term for the American bison -- or did when the Great Plains ecosystem was still functioning. There is no grander spectacle in Earth's biosphere.
I first tasted bison in the summer of 1968, after our Boy Scout group completed a 54-mile hike in the mountains of Philmont Ranch, in Cimarron, NM. There must have been 300 Scouts lining the tables of the great hall in Waite Phillips' mansion, all of us chowing down on bison roast from animals raised on the ranch.
Wife and I no longer eat ground beef, as our local grocer keeps Durham Ranch ground bison on the shelf 365 days a year.