Wildebeest crossing on the Mara River, serengeti National Park, Tanzania.
Common Zebra surrounded by wildebeast waiting to cross the Mara River during the annual migration in the Masai Mara Reserve, Kenya.
Masai giraffes silhouetted against a rising sun in Serengeti National Park, Tanzania.
Wild horses stampeding across creek in Wyoming.
Bull bison crossing a wintery Hayden Valley. Yellowstone National Park., Wyoming.
Polar bears sow and cubs nursing on the pack ice in the arctic above Sptizbergen, Norway.
Wolves running across open snow field in northwest Wyoming.
Chinstrap penguin tobogganing down snow covered hillside in Antarctica.
Wolves from the Wapiti Pack feeding on freshly killed elk in Yellowstone National Park.
Wild puma stalking guanaco's in Torres del Paine National Park, Chile.
White horses of the Camargue galloping through marshes in the Camargue regioin of France.
White horses of the Camargue galloping through water in the Camargue region of France.
Wild horse running at sunset in the Red Desert of Wyoming.
Bull elk in velvet silhouetted against a setting sun Yellowstone National Park.
Pintada Petrel flying across an ice berg Pintado Petrel (Daption capense) flying by icebergs in the Southern Ocean off the coast of Antarctica.
Red Fox moving through pillows of snow in Grand Teton National Park, Wyoming.
Guanaco(Lama guanicoe) high in the mountains of Torres del Paine National Park, Chile.
Cheetah with young playing on an ant hill in the Masai Mara National Reserve, Kenya.
Young African elephants playing in Samburu National Reserve. Kenya, Africa.
Little Bee-eater (Merops pusillus) feeding on bee in Samburu National Park, Kenya.
Carniolan honey bee (Apis mellifera carnica, Pollmann) hive in Slovenia,
Inquisitive grizzly bear standing to get a better view in willow patch. Grand Teton National Park, Wyoming.
Great Grey Owl in Grand Teton Natioanal Park, Wyoming.
Elk migrating across the Snake River to the National Elk Refuge. Grand Teton National Park, Wyoming.
Rare albino mule deer in central Wyoming.
Herd of wild horses running thought the snow in the Red Desert of Wyoming.
Pryor Mountain wild horses on the border of Montana and Wyoming. Photo of Cloud stallion running through a field of Lupine.
Endangered Snail Kite (rosthrhamus sociabilis) hunting for snails in Florida.
Endangered Black-footed Ferret, North America's most endangered mammal. Found in Arizona, Wyoming, Montana, South Dakota.
Dancing polar bears play boxing in Churchill, Manitoba.
American bald eagles compete for a search in Yellowstone National Park, Wyoming.