American Bison scratching belly on a boulder in Yellowstone National Park Wyoming.
Muskox posing in fall tundra near the Dalton Highway in Alaska.
Caribou grazing in Denal National Park Alaska.
Caribou with antlers covered in velvet posing in Denali National Park Alaska.
Cape buffalo with an aggressive expression on his face Serengeti National Park Tanzania.
Two bull moose sparing Anchorage Alaska.
Bull elk crossing the Madison River at sunrise in Yellowstone National Park Wyoming.
Bull elk with frost on its back posing at sunrise in Gibbon Meadows in Yellowstone National Park Wyoming.
Silhouette of caribou antler with skull at sunset in Northwest Territories Canada.