Elk of the Rockies with the Sigma 150-600mm Sports » Liam-Doran-8051
This bull was by far the most aggressive of any of the bulls I saw this day. He was not even close to the largest but he had the biggest harem. Numerous satellite bulls dogged him as he tried to keep his cows together. 1/400 sec. f/8 ISO 3200 at 569mm.