In Yellowstone right now but I figured I'd post a couple of pictures of a Wolf / Bison fight we witnessed on 2/9. To set the scene. Firehole River near Biscuit Basin. Wapiti pack which has about 15 wolves surrounded a young male. They tried to take him down. He was able to make it into the river where the wolves backed off creating a long standoff. At nightfall the Bison climbed out of the river surrounded by 3 large males and moved off ouf of sight with the pack in tow. What went on later is anyones guess. The whole event was about 200yds away.