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A group of bull caribou migrate through Gates of the Arctic National Park & Preserve in the area near the Alatna River headwaters, Arctic Alaska, Fall
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Caribou migrate through Gates of the Arctic National Park & Preserve near the Alatna River headwaters, Arctic Alaska, Fall
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A group of cow and calf caribou migrate through Gates of the Arctic National Park & Preserve in the area near the Alatna River headwaters, Arctic Alaska, Fall
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View of the Porcupine Caribou herd heading up the bank from a gravel bar by Hulahula River in ANWR, Arctic Alaska, Summer
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View of the Porcupine Caribou herd crossing the Hulahula River near Old Man Creek during their annual migration through ANWR, Arctic Alaska, Summer
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View of the Porcupine Caribou herd climbing a steep bank after swimming across the Hulahula River during their annual migration in ANWR, Arctic Alaska, Summer
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Caribou bulls swimming across Kobuk River Arctic Alaska Autumn Kobuk Valley National Park
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A set of caribou antlers rests alongside the headwaters for the Alatna River in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Caribou herd swimming across Kobuk River Arctic Alaska Autumn Kobuk Valley National Park
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A pair of bull caribou wander the open landscape near Savage River in Denali National Park and Preserve, Interior Alaska, Summer
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Western Arctic Caribou herd migrating north in spring through Delong Mountains Brooks Range Western Alaska
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Porcupine Caribou herd crossing Turner River Arctic National Wildlife Refuge Arctic AK Summer
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Buses and campers stop to view a band of adult Dall Sheep rams standing in autumn colored brush near the Park Road in Denali National Park and Preserve, Interior Alaska, Fall
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Western Arctic Caribou herd migrating north near Cape Lisburne Brooks Range Alaska Spring
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Band of Dall sheep ram standing and grazing in a high mountain meadow with Mt. McKinley in the background, Interior Alaska, Autumn
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Band of Dall sheep ram standing and grazing in a high mountain meadow with Mt. McKinley in the background, Interior Alaska, Autumn
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Band of Dall sheep ram standing and grazing in a high mountain meadow with Mt. McKinley in the background, Interior Alaska, Autumn
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Three Dall sheep ram resting in a high mountain meadow with Mt. McKinley in the background, Interior Alaska, Autumn
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Band of four Dall rams graze on the Autumn colored tundra with the Alaska Range in background, Denali National Park and Preserve, Interior Alaska, Autumn
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Scenic of bull caribou and tundra pond with the northside of Mt. McKinley in the background, fall colors and Denali in the background, Denali National Park and Preserve, Alaska, Fall, COMPOSITE
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A large bull moose approaches a cow resting in his scent pit in the Glen Alps area of Chugach State Park, Southcentral Alaska, Fall
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A band of Dall sheep rams stand on a rocky hillside and look towards Mt. McKinley in the background, Interior Alaska, Autumn
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A band of Dall sheep rams lie and rest in a high mountain meadow, Denali National Park and Preserve, Interior Alaska, Autumn
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Band of ram Dall Sheep rest on a ridge with Alaska Range in the background, Denali National Park and Preserve, Interior Alaska, Spring
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Caribou bulls swimming across Kobuk river at sunset Arctic Alaska Autumn Kobuk Valley National Park
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Aerial view of the John River winding its way through the Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Panoramic view of the northern Brooks Range near the headwaters of the Nigu, Killik and Alatna Rivers in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Low angle view of a sandy gravel bar along the Noatak River in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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View of colorful bearberry creeping across tundra near the headwaters of Alatna River in Gates of the Arctic National Park & Preserve, Brooks Range, Arctic Alaska, Fall
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A pod of Humpack whales feeding near Benjamin Island in Lynn Canal with snowcovered Chilkat Mountains in the background during Winter in Southeast Alaska, Humpback Whale slaps its flukes on the surface near Benjamin Island in Lynn Canal with the snow covered peaks of the Chilkat Mountains in the background, Southeast Alaska, Winter, COMPOSITE
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Local Alaskans & News Crews view whales trapped by sea ice through a breathe hole near Point Barrow during the 1988 California Gray Whale Rescue, Arctic Alaska, Winter/n
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Local Alaskans & News Crews view whales trapped by sea ice through a breathe hole near Point Barrow during the 1988 California Gray Whale Rescue, Arctic Alaska, Winter/n
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Local Alaskans & News Crews view whales trapped by sea ice through a breathe hole near Point Barrow during the 1988 California Gray Whale Rescue, Arctic Alaska, Winter/n
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Local Alaskans & News Crews view whales trapped by sea ice through a breathe hole near Point Barrow during the 1988 California Gray Whale Rescue, Arctic Alaska, Winter/n
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A bull moose examines a cow moose during rutting season in the Glen Alps area of Chugach State Park near Anchorage, Southcentral Alaska, Fall/n
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View of five brown bears fishing in Funnel Creek, Katmai National Park, Southwest Alaska, Summer
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Grizzly Bear sow with her two cubs, Denali National Park, Alaska, Interior, Fall
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National Park Ranger rests with his dog team on the North Fork of the Koyukuk River at sunset with the Gates of the Arctic in the background, Brooks Range, Arctic Alaska, Winter
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Caribou bull standing on a ridgeline with Mt. McKinley and Denali National Park and Preserve in the background, Interior Alaska, Autumn. COMPOSITE
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Close up view of a Rocky Mountain bull elk bugling during the Autumn rut at the Alaska Wildlife Conservation Center near Portage, Southcentral Alaska. CAPTIVE
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Scenic view of a bull moose in rut near Powerline Pass in Chugach State Park with Mount McKinley in the backgound, Southcentral Alaska, Fall
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Scenic view of a bull moose in rut near Powerline Pass in Chugach State Park, Southcentral Alaska, Fall, HDR image.
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Scenic view of a bull moose in rut near Powerline Pass in Chugach State Park with the city of Anchorage in the backgound, Southcentral Alaska, Fall, HDR image.
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A male backpacker and his dog enjoy the view of Mt. McKinley while backpacking in Peters Hills, Denali State Park, Southcentral Alaska, Fall/n
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Aerial view of the Alatna River, a National Wild and Scenic River, winding its way through the Brooks Range in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of the Middle Fork of the Koyukuk River running parallel to the Trans Alaska Pipeline and Dalton Highway near the eastern edge of Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Low angle view of a shallow creek near the Noatak River in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Panoramic view of the upper Alatna River in the Brooks Range of Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of Walker Lake and the Kobuk River winding away from Mount Igikpak in the Schwatka Mountains of the Brooks Range, Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of Walker Lake and the Kobuk River winding away from Mount Igikpak in the Schwatka Mountains of the Brooks Range, Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of evening light refelecting in Walker Lake and Kobuk River in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of the Kobuk River winding through Endicott Mountains in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Aerial view of the North Fork of the Koyukuk River winding through Endicott Mountains and the Brooks Range in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Massive granite peaks rise above the Alatna River in Gates of the Arctic National Park & Preserve, Brooks Range, Arctic Alaska, Fall
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Rock and alpine tundra near the Alatna River headwaters in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Group of Steller Sea Lions congregate on a haul out on an island in the Shelikof Strait near Geographic Harbor, Katmai National Park, Southwest Alaska, Summer, IUCN & ESA Endangered Species
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View of the Toklat Wolf pack's alpha female standing among the fall foliage of Denali National Park, Interior Alaska, Fall
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A bull moose examines a cow moose during the autumn rut in Chugach State Park near Powerline Pass above Anchorage, Southcentral Alaska, Fall/n
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A bull moose examines a cow moose during the autumn rut in Chugach State Park near Powerline Pass above Anchorage, Southcentral Alaska, Fall/n
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A bull moose examines a cow moose during the autumn rut in Chugach State Park near Powerline Pass above Anchorage, Southcentral Alaska, Fall/n
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Portrait of a pair of young bull moose during rutting season in the Glen Alps area of Chugach State Park near Anchorage, Southcentral Alaska, Fall/n
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Portrait of a bull moose during the rutting season in the Glen Alps area of Chugach State Park near Anchorage, Southcentral Alaska, Fall/n
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Musk Ox bulls walking in a field at the Musk Ox Farm near Palmer, Matanuska Valley, Southcentral Alaska, Spring. CAPTIVE
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Musk Ox bulls walking in a field at the Musk Ox Farm near Palmer, Matanuska Valley, Southcentral Alaska, Spring. CAPTIVE
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Wide angle close up of a Wood bison bull at the Alaska Wildlife Conservation Center, Southcentral Alaska, Summer. CAPTIVE
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View of three Mountain Goats walking on a ridge near Harding Icefield Trail in Kenai Fjords National Park near Seward,Kenai Peninsula, Southcentral Alaska, Summer
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Sow and Cub brown bears looking across small lake and viewing Mt. McKinley at sunrise, SouthCentral Alaska, Autumn, COMPOSITE
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Grizzly sub adult male sits on a rock in the middle of Brooks River waiting for spawning Sockeye salmon, Katmai National Park and Preserve, Southwest Alaska, Summer
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A band of caribou cross the snow covered flats of the Savage River, Denali National Park and Preserve, Interior Alaska, Spring
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An adult male Grizzly Bear surveys terrain while standing on hind feet in Sable Pass, Denali National Park and Preserve, Interior Alaska, Spring
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Bull caribou browses amidst the Autumn tundra on the north side of Wonder Lake in Denali National Park & Preserve, Interior Alaska, Fall
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View of Caribou grazing on tundra near Lisburne Oil Facilities on the North Slope, Prudhoe Bay, Arctic Alaska, Summer
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Aerial view of a stream meandering through the foothills of the Brooks Range, Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Low angle view of sunset over the shores of Noatak River in Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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Reflection of a mountain at sunset in the waters of Noatak River, Gates of the Arctic National Park & Preserve, Arctic Alaska, Fall
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View of North Fork Koyukuk River flowing over a rocky gravel bar with Frigid Crags in the background, Gates of the Arctic National Park & Preserve, Arctic Alaska, Summer
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Portrait of a two bull muskoxen with their faces covered in snow, Alaska Wildlife Conservation Center, Portage, Southcentral Alaska, Winter, CAPTIVE
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View of a pair of muskoxen bulls at the Alaska Wildlife Conservation Center during a fresh snowfall, Portage, Southcentral Alaska, Winter, CAPTIVE
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Male coho aggressively compete for females in Power Creek, Copper River Delta near Cordova and Prince William Sound, Southcentral Alaska
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Sockeye salmon jumps Brooks Falls, Katmai National Park, Southwest Alaska, Summer
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Portrait of the alpha female Grey Wolf (Canis lupus) of the Toklat pack, Denali National Park and Preserve, Interior Alaska, Fall
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A young male Caribou climbs a steep ridge line in Denali National Park, Interior Alaska, Fall
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A young male Caribou climbs a steep ridge line in Denali National Park, Interior Alaska, Fall
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A curious full-curled Dall Sheep ram perches on a rocky ledge at mile 107 of the Seward Highway near Windy Corner, Chugach State Park, Southcentral Alaska, Autumn
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Two sub adult brown bears playfighting in Brooks River near Brooks Camp in Katmai National Park, Southwest Alaska, Fall
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Three sockeye salmon jump in front of two adult Brown Bears standing at the top of Brooks Falls, Katmai National Park, Southwest Alaska, Summer
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Grizzly Bear walking on a ridge among fall colors on tundra, Denali National Park, Interior Alaska
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Nine wolves (Canis lupis), part of the Granite Creek Pack, walk along the Park Road toward a stopped tour bus with the Alaska Range in the background, Denali National Park and Preserve in Interior Alaska, Fall
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