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Adult bull killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, 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

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 in Tracy Arm, 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

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 near LeConte Glacier in Southeast Alaska, United States of America, North America

California gray whale calf (Eschrictius robustus), surfacing in San Ignacio Lagoon, Baja California, Mexico, North America

Flightseeing through peaks of Mt. Denali and the Alaskan mountain range, 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 arctos horribilis) (Coastal brown bear), Kenai National Wildlife Refuge, Alaska, United States of America, North America

Juvenile Dall Sheep (Ovis dalli) and lamb among fall color, Denali National Park and Preserve, Alaska, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) walking in a stream, Katmai National Park and Preserve, 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.

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America

Northern (Steller) sea lion (Eumetopias jubatus) fishing on the flood tide in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America

Northern (Steller) sea lions (Eumetopias jubatus) hauled out on South Marble Island in Glacier Bay National Park, Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Adult tufted puffin (Fratercula cirrhata) on the water at South Marble Island, Glacier Bay National Park, Alaska, United States of America

Adult bald eagle (Haliaeetus leucocephalus) with dead salmon in Inian Pass, Southeast Alaska, United States of America

Adult tufted puffin (Fratercula cirrhata) on the water at South Marble Island, Glacier Bay National Park, Alaska, United States of America

Adult bald eagle (Haliaeetus leucocephalus) with dead salmon in Inian Pass, Southeast Alaska, United States of America

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

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

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

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

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

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

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

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

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

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

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

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

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

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

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult mountain goat (Oreamnos americanus) on cliff face in Tracy Arm, Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

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

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

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Sawyer Glacier calving from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area 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 bears (Ursus arctos) and wolf (Canis lupus) feeding on humpback whale carcass in Glacier Bay National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) feeding on humpback whale carcass in Glacier Bay National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) feeding on salmon at Iyoukeen Cove on Chichagof Island, Alaska, United States of America

Adult brown bear (Ursus arctos) feeding on humpback whale carcass 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

Harbor seal (Phoca vitulina) hauled out on submerged log in Misty Fjords National Monument, Southeast Alaska, United States of America

Harbor seals (Phoca vitulina) hauled out on submerged log in Misty Fjords National Monument, Southeast Alaska, United States of America

Partial View of Mount Denali (Mount McKinley) in 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

A large stand of Arctic cotton (Eriophorum callitrix) in Denali National Park, Alaska, United States of America

A large stand of Arctic cotton (Eriophorum callitrix) in Denali National Park, Alaska, United States of America

Adult snowshoe hare (Lepus americanus dalli) 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

Adult Arctic ground squirrel (Spermophilus parryii) foraging in Denali National Park, Alaska, United States of America

Adult grizzly bear (Ursus arctos) mother with cubs in 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