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A black-browed albatross (Thalassarche melanophris) looking at its chick, Saunders Island, Falkland Islands, South Atlantic, South America

King cormorant (Imperial cormorant) (Phalacrocorax atriceps) with nesting material, the Neck, Saunders Island, Falkland Islands, South America

Great Blue Heron (Ardea herodias), the largest North American heron, with nesting material in its beak, United States of America, North America

Nesting Imperial shag, Phalacrocorax atriceps, on small islet in the Beagle Channel, Ushuaia, Argentina, South America

Nesting rock shags, Phalacrocorax magellanicus, on small islet in the Beagle Channel, Ushuaia, Argentina, South America

Adult blue-eyed shag, Leucocarbo atriceps, gathering nesting material at Ocean Harbour, South Georgia Island, Atlantic Ocean

Nesting black-legged kittiwakes (Rissa tridactyla tridactyla), Herald Island, UNESCO World Heritage Site, Chuckchi Sea, Chukotka, Russia, Eurasia

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Black-necked stork (Ephippiorhynchus asiaticus) on nest with eggs, The Wildlife Habitat, Port Douglas, Queensland, Australia, Pacific

Northern gannet nesting colony on the wave crashed island of Little Skellig Michael, County Kerry, Irish Sea, Republic of Ireland, Europe

Northern gannet nesting colony on the island of Little Skellig Michael, County Kerry, Munster, Irish Sea, Republic of Ireland, Europe

Wild gannets (Morus bassanus) colony, nesting. St. Kilda Islands, Outer Hebrides, Scotland, United Kingdom, Europe

Leatherback turtle (Dermochelys coriacea) eggs being collected for transfer to a safer hatchery location, Shell Beach, Guyana, South America

Leatherback turtle (Dermochelys coriacea) laying eggs under the watchful eyes of a conservation worker, Shell Beach, Guyana, South America

Applying a tag to a Leatherback turtle (Dermochelys coriacea) at its nesting site, Shell Beach, Guyana, South America

Researchers measuring a female Leatherback turtle (Dermochelys coriacea) at its nest site, Shell Beach, Guyana, South America

Turtle warden with nesting Leatherback turtle (Dermochelys coriacea), Shell Beach, Guyana, South America

Leatherback turtle (Dermochelys coriacea) eggs being collected for transfer to a safer hatchery location, Shell Beach, Guyana, South America

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Snow storm approaching Alkefjelet, Cape Fanshawe, Spitsbergen, Svalbard, Norway, Scandinavia, Europe

Snow storm approaching Alkefjelet, Cape Fanshawe, Spitsbergen, Svalbard, Norway, Scandinavia, Europe

Steep cliffs filled with nesting birds on the south side of Bjornoya (Bear Island), Svalbard, Norway, Scandinavia, Europe

Magellanic penguins (Spheniscus magellanicus) nesting on an island near Punta Arenas, Patagonia, Chile, South America

An adult light-mantled albatross, Phoebetria palpebrata, landing at nesting site in Elsehul, South Georgia Island, Atlantic Ocean

Leatherback turtle (Dermochelys coriacea) excavating a nest hole, Shell Beach, Guyana, South America

Wild gannets (Morus bassanus) colony, nesting. St. Kilda Islands, Outer Hebrides, Scotland, United Kingdom, Europe

Adult Antarctic shag (Phalacrocorax (atriceps) bransfieldensis), in flight with nesting material, Port Lockroy, Antarctica, Southern Ocean, Polar Regions

Adult dark morph red-footed booby (Sula sula) with nesting material, Genovesa Island, Galapagos Islands, Ecuador, South America

Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) with nesting material, Yellowstone National Park, Wyoming, United States of America, North America

Adult black-browed albatross (Thalassarche melanophrys) pair, nesting site on New Island, Falklands, South Atlantic Ocean, South America

Uinta ground squirrel (Urocitellus armatus) with nesting material, Yellowstone National Park, Wyoming, United States of America, North America

King penguins (Aptenodytes patagonicus) breeding and nesting colony at Gold Harbour, South Georgia, South Atlantic Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) breeding and nesting colony at Gold Harbour, South Georgia, South Atlantic Ocean, Polar Regions

Variegated Squirrel gathering nest material in tree, Nosara, Nicoya Peninsula, Guanacaste Province, Costa Rica, Central America

Osprey (Pandion haliaetus) on nest along the Madison River, Yellowstone National Park, Wyoming, United States of America, North America

Adult black-browed albatross (Thalassarche melanophrys) pair, nesting site on New Island, Falklands, South Atlantic Ocean, South America

King penguins (Aptenodytes patagonicus) breeding and nesting colony at Gold Harbour, South Georgia, South Atlantic Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) at breeding and nesting colony at Salisbury Plain, South Georgia, UK Overseas Protectorate, Polar Regions

Secretarybird (Sagittarius serpentarius) pair building a nest atop an acacia tree, Masai Mara National Reserve, Kenya, East Africa, Africa

Nesting Black-browed Albatross (Thalassarche melanophris), New Island, Falkland Islands, British Overseas Territory, South America

Imperial shag (Leucocarbo atriceps) in flight carrying nesting material, Sea Lion Island, Falkland Islands, South America

Adult black-browed albatross (Thalassarche melanophrys), close up at nesting site on West Point Island, Falklands, South America

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

Imperial shag (Phalacrocorax atriceps), returning to the nest 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 southern rockhopper penguins (Eudyptes chrysocome), at breeding colony on West Point Island, Falklands, South America

Adult southern rockhopper penguins (Eudyptes chrysocome), at breeding colony on West Point Island, Falklands, South America

Adult and okum boy king penguins (Aptenodytes patagonicus) at breeding colony at Gold Harbor, South Georgia, Polar Regions

Sunrise on king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Salisbury Plain, South Georgia, Polar Regions

Adult gentoo penguin (Pygoscelis papua) amongst king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Gold Harbour on South Georgia Island, Southern Ocean, Polar Regions

Northern giant petrel (Macronectes halli) amongst king penguin chicks at Gold Harbour, South Georgia, Southern Ocean, Polar Regions

Antarctic shag (Phalacrocorax atriceps bransfieldensis), in flight with nesting material in its beak at Jougla Point, Antarctica, Polar Regions

Antarctic tern (Sterna vittata), on the wreck of the Guvernoren in the Enterprise Islands, Antarctica, Southern Ocean, Polar Regions

Four month old Harpy eagle chick (Harpia harpyja), testing its wings in the nest, Alta Floresta, Amazon, Brazil, South America

Adelie penguin (Pygoscelis adeliae), feeding chick at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions

Adult Magellanic penguin (Spheniscus magellanicus) at a breeding site on Peninsula Valdez, Patagonia, Argentina, South America

Adult Magellanic penguin (Spheniscus magellanicus) at a breeding site on Peninsula Valdez, Patagonia, Argentina, South America

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

Adult kelp gull (Larus dominicanus), nesting on lichen covered rocks on Half Moon Island in Antarctica, Southern Ocean, Polar Regions

Adult gentoo penguin (Pygoscelis papua), feeding chicks at Brown Bluff near the Antarctic Peninsula, Southern Ocean, Polar Regions

Adult dovekies (Little Auk) (Alle alle) at their breeding site amongst scree slopes at Rubini Rock, Tikhaya Bay, Hooker Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult dovekie (Little Auk) (Alle alle) at their breeding site amongst scree slopes at Rubini Rock, Tikhaya Bay, Hooker Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult dovekies (Little Auk) (Alle alle) at their breeding site amongst scree slopes at Rubini Rock, Tikhaya Bay, Hooker Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult dovekies (Little Auk) (Alle alle) at their breeding site amongst scree slopes at Rubini Rock, Tikhaya Bay, Hooker Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

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

Adult black-legged kittiwake (Rissa tridactyla) in combat with a second kittiwake near Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult black-legged kittiwakes (Rissa tridactyla) on ice near Alexander Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

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

A newly discovered ivory gull (Pagophila eburnea) breeding colony on Alexander Island in Franz Josef Land, Russia, Eurasia

Seagull nesting on the Lihou islet, Island of Guernsey, Bailiwick of Guernsey, British Crown dependency, English Channel, Europe

Chinstrap penguins (Pygoscelis antarctica), breeding colony at Half Moon Island, Antarctica, Southern Ocean, Polar Regions

Chinstrap penguins (Pygoscelis antarctica), breeding colony at Half Moon Island, Antarctica, Southern Ocean, Polar Regions

Chinstrap penguins (Pygoscelis antarctica), ecstatic display at breeding colony at Half Moon Island, Antarctica, Polar Regions

Adult Dovekie (Little Auk) (Alle alle) breeding area in the Norge Islands in the Svalbard Archipelago, Norway, Arctic, Europe

Adult black-legged kittiwakes (Rissa tridactyla) feeding at the base of a glacier in the Svalbard Archipelago, Norway, Arctic, Europe

Adult black-legged kittiwakes (Rissa tridactyla) feeding at the base of a glacier in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) in flight near breeding and nesting site at Cape Fanshawe in Svalbard, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Adult glaucous gull (Larus hyperboreus) eating common eider duckling (Somateria mollissima) in Svalbard, Norway, Arctic, Europe

Adult female common eider ducks (Somateria mollissima) swimming with ducklings of Edgeoya in Svalbard, Norway, Arctic, Europe

Adult Arctic Skua (Stercorarius parasiticus), on ice floe in the Svalbard Archipelago, Norway, Arctic, Europe

Adult arctic tern (Sterna paradisaea) feeding on small fish on Spitsbergen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Common guillemot (Uria aalge) nesting on Bear Island (Bjornoya) in the Svalbard Archipelago, Norway, Arctic, Europe