Low angle view of silhouetted flock of birds flying against a cloudy sky; Thessaloniki, Greece PacificStock
Red-spotted Butterfly (Limenitis arthemis) soaks up the sunlight; Vian, Oklahoma, United States of America PacificStock
A spider's web collects dew on a summer morning; Astoria, Oregon, United States of America PacificStock
Grizzly bear (ursus arctos horribilis) looking for fish at sunrise in Ni'iinlii Njik (Fishing Branch) Territorial Park; Yukon, Canada PacificStock
Scenic view of Pacific walrus (Odobenus rosmarus) hauled out on Second Beach, Walrus Islands State Game Sanctuary, Round Island, Bristol Bay, Western Alaska, USA PacificStock
Lenticular clouds form overtop of Crow Mountain while a set of caribou antlers lie on the rocks; Old Crow, Yukon, Canada PacificStock
Pair of Tufted Puffins (Fratercula cirrhata) preening on a lichen covered boulder in afternoon sunshine, Walrus Islands State Game Sanctuary, Round Island, Bristol Bay, Alaska PacificStock
Mother and baby koala bears (Phascolarctos cinereus) cuddled up in a tree; Noosa, Queensland, Australia PacificStock
A Common Redpoll (Carduelis flammea) perches atop a snowy spruce tree on a frigid day in Interior Alaska. Fairbanks, Alaska PacificStock
An American bullfrog (Lithobates catesbeianus) rests in a pond; Tahlequah, Oklahoma, United States of America PacificStock
Bull moose (alces alces) fighting with antlers in autumn; Anchorage, Alaska, United States of America PacificStock
A Black bear with Exit Glacier in the background on a sunny summer day in Kenai Fjords National Park, Kenai Peninsula, Southcentral Alaska. PacificStock
Bull moose (alces alces) play fighting during rutting season in the Anchorage area; Alaska, United States of America PacificStock
Nine King Penguins (Aptenodytes patagonicus); South Georgia, South Georgia and the South Sandwich Islands, United Kingdom PacificStock
Moose (alces alces) feeding in a shallow pond south of Cantwell, photo taken from Parks Highway common moose habitat; Alaska, United States of America PacificStock
A Great Egret (Ardea alba) stalks small fish; Ridgefield, Washington, United States of America PacificStock
A caribou antler lies in silence on the flanks of Crow Mountain; Old Crow, Yukon, Canada PacificStock
Polar bear (ursus maritimus) along the Hudson Bay coastline waiting for the bay to freeze over; Churchill, Manitoba, Canada PacificStock
A herd of wildebeest (Connochaetes taurinus) migrates on the African savannah as the sun goes down in an orange glow, a single acacia tree stands out on the horizon; Narok, Kenya PacificStock
Portrait of Bengal Tiger (panthera tigris tigris) endangered species, captive; Chippewa Falls, Wisconsin, United States of America PacificStock
A breaching humpback whale (Megaptera novaeangliae) off the West side of the island of Maui; Maui, Hawaii, United States of America PacificStock
Black bear (Ursus americanus) feeding on pink salmon along Dayville Road; Valdez, Alaska, United States of America PacificStock
A cow moose (alces alces) stands in nice light in Denali National Park and Preserve, interior Alaska; Alaska, United States of America PacificStock
An orb weaver spider (Araneus diadematus) tends her web; Astoria, Oregon, United States of America PacificStock
A Grizzly Bear walking alongside the Park Road in Area 14 with Mount McKinley in the Background, Denali National Park, Interior Alaska PacificStock
A Western Gull (Larus occidentalis) perches on a cliff at Yaquina Head; Newport, Oregon, United States of America PacificStock
Vivid red Cardinal (Cardinalis cardinalis) sitting on a tree branch with a beautiful blue sky in the background; Kentucky, United States of America PacificStock
A belted kingfisher (Megaceryle alcyon) waits to dive for small fish; Astoria, Oregon, United States of America PacificStock