Polar bear (ursus maritimus) along the Hudson Bay coastline waiting for the bay to freeze over; Churchill, Manitoba, Canada PacificStock
Old cowboy boots hanging in memory of John Booth, Great Sandhills, near Sceptre; Saskatchewan, Canada PacificStock
Snowy birch and evergreen trees in atmospheric landscape during sunrise in winter, North Pole, interior Alaska; Alaska, United States of America PacificStock
Purple tulips in a vase with an antique key hanging gracefully around the vase; Chilliwack, British Columbia, Canada PacificStock
The Astoria-Megler Bridge disappears into the fog; Astoria, Oregon, United States of America PacificStock
Pieces of collapsed ice inside a Black Rapids Glacier cave; Alaska, United States of America PacificStock
Long exposure of the surf along Wailua Beach; Wailua, Kauai, Hawaii, United States of America PacificStock
Polar bear (ursus maritimus) along the Hudson Bay coastline waiting for the bay to freeze over; Churchill, Manitoba, Canada PacificStock
Grizzly bear (Ursus arctos) fishing for sockeye salmon at Brooks Falls in Katmai National Park & Preserve, Southwest Alaska; Alaska, United States of America PacificStock
Detail of water cascading down dark rock on Bridalveil Falls in Keystone Canyon, South-central Alaska; Valdez, Alaska, United States of America PacificStock
Alaska Peninsula Brown Bear (ursus arctos horribilis) and it's cub walking to the edge of a lake on a foggy morning, Lake Clark National Park; Alaska, United States of America PacificStock
Southern Elephant Seal (Mirounga leonina) looking up with mouth open, Neko Harbour, Antarctic Peninsula; Antarctica PacificStock
Mountain tent on ridge in winter, Mt. McKinley in background, part of Mt. Dan Beard immediately behind tent, Denali National Park and Preserve; Alaska, United States of America PacificStock
Chinstrap Penguin (Pygoscelis antarctica) on belly; Half Moon Island, South Shetland Islands, Antarctica PacificStock
Chinstrap Penguin (Pygoscelis antarctica) in a snowfall; Half Moon Island, South Shetland Islands, Antarctica PacificStock
Chinstrap Penguin (Pygoscelis antarctica) in a snowfall; Half Moon Island, South Shetland Islands, Antarctica PacificStock
Green coniferous forest on a tranquil lake shore with red rock geological formations; Killarney, Ontario, Canada PacificStock
An Orca Whale (Killer Whale) (Orcinus orca) surfaces in Lynn Canal, Herbert Glacier, Inside Passage; Alaska, United States of America PacificStock
Close up of a brown bear (ursus arctos) in the snow, captive at the Alaska Wildlife Conservation Center; Portage, Alaska, United States of America PacificStock
Chinstrap Penguin (Pygoscelis antarctica) with it's head cocked to the side; Half Moon Island, South Shetland Islands, Antarctica PacificStock
Bison walking in the early morning through the snow, Elk Island National Park; Alberta, Canada PacificStock
A dropped Iditarod sled dog howls at the Finger Lake checkpoint during the 2013 Iditarod, Southcentral Alaska PacificStock