First time poster, but user of Canon for the last few years. I recently went on a trip to Jackson Hole, Wyoming - which is BEYOND beautiful - and got lucky enough to capture these bison against the Grand Teton mountain range. Shortly after taking this picture, they jumped the fence and crossed the highway. Pretty wild sight. 
Taken with Canon EOS 5D Mark IV camera and EF 70-200mm f/2.8L IS II USM lens
