Bull elephant posing in Ngorongoro Crater in Tanzania.
Two bull moose sparing Anchorage Alaska.
Bull elk with frost on its back posing at sunrise in Gibbon Meadows in Yellowstone National Park Wyoming.
Bull moose in fall color of tundra in Denali National Park Alaska.
Head shot of bull moose on the Power Line Trail, Chugach State Park, Alaska.
Bull moose in fall tundra near Wonder Lake in Denali National Park Alaska.
Bull elk bugling in Hayden Valley in Yellowstone National Park Wyoming.
Bull moose posing Anchorage Alaska.
