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Leucistic king penguin chick, Aptenodytes patagonicus, at breeding colony on Salisbury Plain, South Georgia Island, Atlantic Ocean

Leucistic king penguin chick, Aptenodytes patagonicus, at breeding colony on Salisbury Plain, South Georgia Island, Atlantic Ocean

An adult male green iguana, Iguana iguana, in breeding coloration, Tortuguero National Park, Costa Rica, Central America

Leucistic king penguin chick, Aptenodytes patagonicus, at breeding colony on Salisbury Plain, South Georgia Island, Atlantic Ocean

Black-browed albatross, Thalassarche melanophris, in flight at breeding colony on West Point Island, Falkland Islands, South Atlantic Ocean

Leucistic king penguin chick, Aptenodytes patagonicus, at breeding colony on Salisbury Plain, South Georgia Island, Atlantic Ocean

Female southern elephant seal, Mirounga leonina, at breeding colony at Gold Harbour, South Georgia Island, Atlantic Ocean

Black-browed albatross, Thalassarche melanophris, at breeding colony on New Island, Falkland Islands, South Atlantic Ocean

Black-browed albatross, Thalassarche melanophris, at breeding colony on West Point Island, Falkland Islands, South Atlantic Ocean

Imperial shag, Phalacrocorax atriceps, breeding site at small islet in the Beagle Channel, Ushuaia, Argentina, South America

Black-browed albatross, Thalassarche melanophris, at breeding colony on New Island, Falkland Islands, South Atlantic Ocean

Magnificent frigatebird (Fregata magnificens), breeding colony in Bahia Gabriel, Isla del Espiritu Santo, Baja California Sur, Mexico, North America

Black-browed albatross (Thalassarche melanophrys) chick, close-up, on the nest at nesting site on New Island, Falklands, South America

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

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

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

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

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

A gentoo penguin (Pygoscelis papua), breeding colony beneath a Union Jack flag flying at British Base A at Port Lockroy, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua), breeding colony beneath Union Jack flag, at British Base A at Port Lockroy, Antarctica, Polar Regions

A raft of common murres (Uria aalge) at breeding site on South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

A raft of common murres (Uria aalge) at breeding site on South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

Sunrise on king penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

Adult King penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) head detail at its breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adults establishing partners at breeding colony in Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adults establishing partners at breeding colony in Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adult with chick at breeding colony in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal (Mirounga leoninar) weaners at breeding beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seals (Mirounga leoninar), at breeding beach in Gold Harbor, South Georgia, Polar Regions

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarcticus), leaping from the sea at breeding colony on Barrientos Island, Antarctica, Polar Regions

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), breeding colony on Weincke Island, Naumeyer Channel, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae), breeding colony in a snowstorm at Brown Bluff, Antarctic Sound, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae), on an ice floe at a breeding colony on Joinville Island, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae), breeding colony in a snowstorm at Brown Bluff, Antarctic Sound, Antarctica, Polar Regions

King penguin (Aptenodytes patagonicus), breeding colony at Salisbury Plain, South Georgia, South Atlantic, Polar Regions

Adult black-browed albatrosses (Thalassarche melanophris), at breeding colony on New Island, Falklands, South America

Adult black-browed albatrosses (Thalassarche melanophris), in flight at breeding colony on West Point Island, Falklands, South America

Black-browed albatross (Thalassarche melanophris), chicks at breeding colony on Saunders Island, Falklands, South America

Black-browed albatross (Thalassarche melanophris), chicks at breeding colony on Saunders Island, Falklands, South America

Black-browed albatross (Thalassarche melanophris), chick at breeding colony on Saunders Island, Falklands, South America

Southern rockhopper penguin breeding colony (Eudyptes chrysocome), on Saunders Island, Falkland Islands, South America

Adult female upland goose (Chloephaga picta) with goslings on Carcass Island in the Falkland Islands

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

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

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

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

Adult Atlantic puffins (Fratercula arctica), breeding on the island of Bolscheoya in the Svalbard Archipelago, Norway

Adult arctic tern (Sterna paradisaea) male bringing female a fish, Spitsbergen Island in the Svalbard Archipelago, Norway

Landscape for Breeding and Training of Ceremonial Carriage Horses at Kladruby nad Labem, UNESCO World Heritage Site, Pardubice Region, Czech Republic, Europe

Adelie penguins (Pygoscelis adeliae), leaping near breeding colony, Heroina Island, Danger Island Group, Antarctica, Polar Regions

Black-browed albatross (Thalassarche melanophris), chicks at breeding colony on Saunders Island, Falklands, South America

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

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

Magnificent frigatebird (Fregata magnificens), breeding colony in Bahia Gabriel, Isla del Espiritu Santo, BCS, Mexico, North America

An Atlantic Puffin (Fratercula arctica), on a cliff edge in Borgarfjaroarhofn, Iceland, Polar Regions

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

Gentoo penguin (Pygoscelis papua) chicks at Jougla Point, Wiencke Island, Antarctica, Southern Ocean, Polar Regions

Gentoo penguin (Pygoscelis papua) adult and chick at Cuverville Island, Antarctica, Southern Ocean, Polar Regions

King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean, Polar Regions

Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean

Spotted sandpiper (Actitis macularius) non-breeding plumage, common shorebird in the Americas, Nosara River, Nosara, Guanacaste, Costa Rica

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

Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) returning to the colony with nesting material, Falkland Islands

Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) exhibiting intense breeding plumage, New Island, Falkland Islands

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

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

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

A raft of common murres (Uria aalge) at breeding site on South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

Pre-dawn light on elephant seals (Mirounga leoninar), at breeding beach in Gold Harbor, South Georgia, Polar Regions

Breeding elegant terns (Thalasseus elegans) return to colony on Isla Rasa, Baja California Norte, Mexico, North America

Connemara ponies in the rain, Ballinakill Bay, Letterfrack, Connemara, County Galway, Connacht, Republic of Ireland

Adult black-browed albatross (Thalassarche melanophrys), in flight returning to nesting site on West Point Island, Falklands, South America

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