Bison in the Sagebrush

American Bison -- Yellowstone National Park, WY
Canon EOS Rebel T5i, EF 100-400mm f/4.5-5.6L IS II USM, f/5.6, 1/1600s, ISO: 1600

We saw this guy off by himself traveling North toward Mammoth Hot Springs on the West side of the Grand Loop in Yellowstone.  We had him/her all to ourselves for a little while.  We stayed on the opposite side of the road.  This photo was taken completely zoomed in to 400mm and is roughly fifty percent cropped.  I point this out because we were careful to keep our distance.  The people that pulled in front of us and got out of their car within twenty feet of this large animal were not nearly so cautious or respectful.  This is one of my great frustrations with the national parks.  The parks are great but people with their cell phones often spoil what could be amazing experiences with a little more care about their surroundings.