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Cliffs at the Wick, on the south coast of Skomer Island, a nature reserve off the coast of Pembrokeshire, Wales, United Kingdom, Europe

Dry stone walls, Inishmore, largest of the Aran Islands, Galway Bay, County Galway, Connacht, Republic of Ireland

Adult rockhopper penguin (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands

Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands

Adult male long-tailed meadowlark (Sturnella loyca) in breeding plumage on New Island in the Falkland Islands

Black-browed albatross (Thalassarche melanophrys) breeding colony on Steeple Jason Island in the Falkland Islands

Black-browed albatross (Thalassarche melanophrys) breeding colony on Carcass Island in the Falkland Islands

Adult male long-tailed meadowlark (Sturnella loyca) in breeding plumage on New Island in the Falkland Islands

Southern right whale (Eubalaena australis) mother being harassed by kelp gull, near Puerto Pyramides, Argentina

Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina

Southern right whale (Eubalaena australis) mother and calf being harassed by kelp gull, Peninsula Valdez, Argentina

Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina

Horse-eye jacks (Caranx latus), schooling in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

West Indian manatee (Trichechus manatus), with sharksucker, Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Caribbean spiny lobster (Panulirus argus), underwater at Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

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

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

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

Adult male spruce (Franklin's) grouse (Falcipennis canadensis) near Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) scratching its back on a tree at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult dovekie (Alle alle alle) breeding area on the island of Bolscheoya in the Svalbard Archipelago, Norway

Adult common (northern) minke whale (Balaenoptera acutorostrata) sub-surface feeding in the Svalbard Archipelago, Norway

Basalt columns and sea cliffs, Rathlin Island, County Antrim, Ulster, Northern Ireland, United Kingdom

Mother polar bear (Ursus maritimus), with cub of the year in Holmabukta in the Svalbard Archipelago, Norway

Two mother polar bears (Ursus maritimus) with cubs of the year watch a male bear feeding on a fin whale carcass in Svalbard, Norway

A mother polar bear (Ursus maritimus), with cub of the year feeding on a fin whale carcass in Holmabukta, Svalbard, Norway

Large trees in forest surrounding the Center for rescue and recovery of black bears, Kuang Si, Luang Prabang, northern Laos

Adult Atlantin puffin (Fratercula arctica) during breeding season, Isfjardardjup, Westfjords region, Northwestern Iceland

Adult Atlantin puffin (Fratercula arctica) during breeding season, Isfjardardjup, Westfjords region, Northwestern Iceland

Northern gannet (Morus bassanas), on the wing at the cliffs of Noss, Shetland Islands, Scotland, United Kingdom

Lake Sandoval and Aguaje palms, Tambopata National Reserve, Puerto Maldonado, Madre de Dios, Peru, South America

Neotropic cormorant (Phalacrocorax brasilianus) (Phalacrocorax olivaceus) (Nannopterum brasilianum), Lake Sandoval, Tambopata National Reserve, Peru, South America

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Imperial Shag (Phalacrocorax atriceps), pair exhibiting courtship behavior on New Island in the Falkland Islands, South America

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Adult king penguins (Aptenodytes patagonicus) amongst chicks at breeding colony at Gold Harbour, South Georgia Island, Polar Regions

Macaroni penguins (Eudyptes chrysolophus) scrambling up steep cliffs at Hercules Bay on South Georgia Island, Polar Regions

Macaroni penguins (Eudyptes chrysolophus) scrambling up steep cliffs at Hercules Bay on South Georgia Island, Polar Regions

Views of the Chilean research base Presidente Eduardo Frei Montalva, Antarctica, Southern Ocean, Polar Regions

Adelie penguins (Pygoscelis adeliae), with chinstrap penguins (Pygoscelis antarctica), on ice at Booth Island, Antarctica, Polar Regions

Mother southern elephant seals (Mirounga leonina) posturing at breeding site at Peggotty Bluff on South Georgia Island, Polar Regions

Adult bull southern elephant seal (Mirounga leonina) with females and pups at Gold Harbour on South Georgia Island, Polar Regions

Southern elephant seal (Mirounga leonina) challenger bull in the surf at Gold Harbour on South Georgia Island, Polar Regions

Adult bull southern elephant seal (Mirounga leonina) stretching amongst king penguins at Gold Harbour, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) weaner pup head detail on the beach at Gold Harbour on South Georgia, Polar Regions

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

Adult black-legged kittiwake (Rissa tridactyla) in flight near Alexander Island in Franz Josef Land, Russia, Eurasia

Adult cape petrels (Daption capense), in flight near Deception Island, Antarctica, Southern Ocean, Polar Regions

Views of the Chilean inactive research base Gonzalez Videla on Waterboat Point in Paradise Bay, Antarctica, Polar Regions

An old, emaciated adult male polar bear (Ursus maritimus) desperately searching for food in the Svalbard Archipelago, Norway, Arctic, Europe

Young Captive Galapagos giant tortoise (Geochelone elephantopus) being fed, San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Lava lizard (Microlophus spp) in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America

The very colorful Galapagos land iguana (Conolophus subcristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Opuntia cactus (Opuntia echios) cactus growing in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Young Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Young Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Adult spectacled petrel (Procellaria conspicillata) in flight near Nightingale Island, part of the Tristan da Cunha Group, South Atlantic Ocean

Green sea turtle (Chelonia mydas) tracks left from a female laying eggs the previous night on Long Beach on Ascension Island, South Atlantic Ocean

Caspian Tern (Hydroprogne caspia) at breeding colony on Ile des Oiseaux in the Parc National du Delta du Saloum, UNESCO World Heritage Site, Senegal, West Africa, Africa

Leucistic caused by lack of melanin, or blond Antarctic fur seal pup (Arctocephalus gazella) on South Georgia, Polar Regions

King penguins (Aptenodytes patagonicus) at breeding and nesting colony at Salisbury Plain in the Bay of Isles, South Georgia, Polar Regions

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

Adult black-browed albatross (Thalassarche melanophrys) in Elsehul on South Georgia, Southern Ocean, Polar Regions

Black-browed albatross (Thalassarche melanophrys) nesting site on West Point Island, Falklands, South Atlantic Ocean, South America

White rhino (Ceratotherium simum) silhouette, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa, Africa

Adult male Antarctic fur seal (Arctocephalus gazella) hauled out on ice near Brown Bluff, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarctica) breeding colony at Baily Head on Deception Island, Antarctica, Southern Ocean, Polar Regions

Gentoo penguin (Pygoscelis papua) adult with chicks at breeding colony on Damoy Point, Antarctica, Southern Ocean, Polar Regions

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Young Galapagos hawk (Buteo galapagoensis) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult male yellow warbler (Dendroica petechia aureola) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Baleen whale skeleton, most likely a young Bryde's whale, on lava flow in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Crabeater seals (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica, Polar Regions