It was early one morning when I found this Bull Elk crossing the Madison River in the Yellowstone National Park in western Wyoming. During the rut the antlers will darken, or become stained from dirt, mud, bark, sap, and blood, turning them to various shades of browns to almost black. The bulls will be less and less social with their summer time companions. They will soon begin to seek out the cows and form their harems. Only the largest and strongest of the bulls will become herd bulls and be able to take and hold a herd of cows.
Canon EOS 1D MK3, EF 400mm F2.8 USM L lens, 1/4 x Canon Teleconverter, Gitzo Monopod