This bison was found in a snowbank and plowed his way to the road. Very sturdy beasts for sure. At this stop, I started out using my 500mm lens on a tripod and then switched to the 100-400, which was a good move. Ended up with a good variety of shots.
Taken with Canon 1DX and Canon 100-400 II lens, handheld
Manual mode, 1/1000 sec @ F6.3, ISO 400, spot metering off the snow
Since the colors were muted in the snow, converted it to B&W using NIK Silver Efex Pro II