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Adult humpback whale (Megaptera novaeangliae) tail throw among feeding whales in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Adult brown bear pair (Ursus arctos) mock-fighting at Scidmore Cut in Glacier Bay National Park, Alaska, United States of America

A small pod of killer whales (Orcinus orca) encountered in Glacier Bay National Park, Southeast Alaska, United States of America

Riding the bus along the 92 mile-long road into Denali National Park, Alaska, United States of America

White Snowshoe Hare sitting in its snowy burrow, Denali National Park, Alaska, United States of America, North America

An Alaskan moose in winter roaming the Denali National Park, Alaska, United States of America, North America

Alaskan Railroad going through Denali National Park in the winter, Alaska, United States of America, North America

A rocky snow covered mountain in the Denali National Park, Alaska, United States of America, North America

Sunrise over the frozen Otto Lake and snowy mountains of Denali National Park in the background, Alaska, United States of America, North America

Mount Drum, Sanford, Wrangell, and Blackburn, Wrangell-St. Elias National Park, UNESCO World Heritage Site, Willow Creek, Alaska, United States of America, North America

Puffin, Alaska Sealife Centre, Coldwater Marine Science Facility, Seward, Resurrection Bay, Kenai Peninsula, Alaska, United States of America, North America

Juneau, State Capital, view from the sea, mist clears over downtown buildings, mountains, forest and float planes, Alaksa, United States of America, North America

Early morning reflections in summer, Behm Canal, Misty Fjords National Monument, Tongass National Forest, Ketchikan, Alaska, United States of America, North America

Cruise ship, Rudyerd Bay, beautiful day in summer, Misty Fjords National Monument, Tongass National Forest, Ketchikan, Alaska, United States of America, North America

Glowing cognac (brandy) reflections, glass table at sunset, cruise ship stern, Resurrection Bay, Kenai Peninsula, Alaska, United States of America, North America

Harbour Seals (Phoca Vitulina) on an iceberg, blue ice of Aialik Glacier, Kenai Fjords National Park, near Seward, Alaska, United States of America, North America

Harbour Seals (Phoca Vitulina) on an iceberg, Aialik Glacier, Harding Icefield, Kenai Fjords National Park, Alaska, United States of America, North America

Aialik Glacier, mountains, island and blue ice, Harding Icefield, Kenai Fjords National Park, near Seward, Alaska, United States of America, North America

Aialik Glacier and mountains, perfect summer day, Harding Icefield, Kenai Fjords National Park, near Seward, Alaska, United States of America, North America

Colourful kayaks, Aialik Glacier, blue ice and mountains, Harding Icefield, Kenai Fjords National Park, near Seward, Alaska, United States of America, North America

Sea otters (Enhyrda lutris), endangered species, calm waters of Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Mount Edgecumbe reflections, extinct volcano, Kruzof island, from Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Sea otters (Enhyrda lutris), endangered species, calm waters of Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Spectacular iceberg, with stunning blue cube, Tracy Arm Fjord, misty conditions, near South Sawyer Glacier, Alaska, United States of America, North America

Ice pack and blue ice face of South Sawyer Glacier, mountain backdrop, Stikine Icefield, Tracy Arm Fjord, Alaska, United States of America, North America

Ice pack and blue ice face of South Sawyer Glacier, mountain backdrop, Stikine Icefield, Tracy Arm Fjord, Alaska, United States of America, North America

Blue ice face and floating ice, Sawyer Glacier and mountains, misty conditions, Stikine Icefield, Tracy Arm Fjord, Alaska, United States of America, North America

Panoramic landscape of the Denali Mountain (Mount McKinley), Denali National Park, Alaska, United States of america, North America

Grizzly bear (brown) bear (Ursus arctos), Moraine Creek (River), Katmai National Park and Reserve, Alaska, United States of America, North America

Grizzly bear (brown bear) (Ursus arctos), Moraine Creek (River), Katmai National Park and Reserve, Alaska, United States of America, North America

Holgate Glacier, Harding Icefield, Kenai Fjords National Park, Alaska, United States of America, North America

Scenery, Homer, Harding Icefield, Kachemak Bay, Kenai Fjords National Park, Alaska, United States of America, North America

Holgate Glacier, Harding Icefield, Kenai Fjords National Park, Alaska, United States of America, North America

An adult bull porcupine caribou (Rangifer tarandus granti), hiding in fall color changes in Denali National Park, Alaska, United States of America, North America

Lamplugh Glacier, a tidewater glacier in Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

Auke Bay as seen from a small private plane flying from Juneau to Gustavus, Southeast Alaska, United States of America, North America

A raft of common murres (Uria aalge) at breeding site on South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

A raft of common murres (Uria aalge) at breeding site on South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

Wild Nootka lupine (Lupinus nootkatensis), in the Kagamil Island, Aleutians, Alaska, United States of America, North America

An adult brown bear (Ursus arctos), in Geographic Harbor, Katmai National Park, Alaska, United States of America, North America

Fall color change amongst the trees and shrubs in Denali National Park, Alaska, United States of America, North America

Fall color change amongst the trees and shrubs in Polychrome Pass in Denali National Park, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), surfacing with spout in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult North American porcupine (Erethizon dorsatum), running in Glacier Bay National Park, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive at sunset in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lion (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lions (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult bald eagle (Haliaeetus leucocephalus), dive bombing for a fish in the Inian Islands, Southeast Alaska, United States of America, North America

Glacial iceberg detail from ice calved off the South Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America, North America

Views from the fishing town of Petersburg on Mitkof Island at low tide, Southeast Alaska, Pacific Ocean, United States of America, North America

Scenic views of the south Sawyer Glacier in Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America, North America

The Lindblad Expeditions ship National Geographic Sea Bird operating in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Guest from the Lindblad Expeditions ship National Geographic Sea Bird behind a mushroom or toadstool in Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations near a feeding sea otter in Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations near a feeding sea otter in Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations in Tracy Arm, Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations in Tracy Arm, Southeast Alaska, United States of America, North America

Northern lights (Aurora borealis) illuminate the night sky along the horizon behind mountains near Anchorage, Alaska, United States Of America.

Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America

Partial View of Mount Denali (Mount McKinley) in Denali National Park, Alaska, United States of America

Riding the bus along the 92 mile-long road into Denali National Park, Alaska, United States of America

View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America

View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America

View from Park Service platform where adult brown bears (Ursus arctos) forage for salmon, Katmai National Park, Alaska, United States of America

Moraine Creek (River), Katmai National Park and Reserve, Alaska, United States of America, North America

Northern fur seal (Callorhinus ursinus), Resurrection Bay, Kenai Fjords National Park, Alaska, United States of America, North America

Curious Steller sea lions (Eumetopias jubatus), South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

The Seward Harbor in Resurrection Bay, gateway to the Kenai Fjords in Kenai Fjords National Park, Alaska, United States of America, North America

Arctic squirrel (Citellus parry), Denali National Park, Alaska, United States of America, North America

Moss covered rocks at water's edge, Prince William Sound, Alaska, United States of America, North America

Arctic ground squirrel (Parka squirrel) (Citellus parryi), Hatcher Pass, Alaska, United States of America, North America

Grizzly bear (Ursus horribilis) in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

Names of fishing boats painted on the rocks in Cross Sound with the Fairweather Mountain Range as backdrop, Alaska, United States of America, North America

Waves crashing against the shore in Cross Sound, Southeast Alaska, United States of America, North America

Glacial iceberg detail from ice calved off the South Sawyer Glacier in Tracy Arm, Southeast Alaska, Pacific Ocean, United States of America, North America

Glacial iceberg detail from ice calved off the LeConte Glacier, Southeast Alaska, Pacific Ocean, United States of America, North America

Black-legged kittiwakes (Rissa tridactyla) on iceberg in Tracy Arm, Southeast Alaska, United States of America, North America

A view in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America