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

King penguin (Aptenodytes patagonicus) chicks (okum boys) at nesting colony at Salisbury Plain, South Georgia, Polar Regions

A rare melanistic king penguin (Aptenodytes patagonicus), feeding its okum boy chick at Fortuna Bay, South Georgia Island, Polar Regions

A rare adult melanistic king penguin (Aptenodytes patagonicus), returning from feeding at sea tin Fortuna Bay, South Georgia, Polar Regions

Ostriches (Struthio camelus), plains zebras (Equus quagga) and springboks (Antidorcas marsupialis) at a waterhole, Nxai Pan National Park, Botswana, Africa

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

Northern giant petrel (Macronectes halli) threat display on the beach at Stromness, South Georgia, Southern Ocean, Polar Regions

Northern giant petrel (Macronectes halli) attempting to eat a king penguin chick (Aptenodytes patagonicus), Gold Harbour, South Georgia, Polar Regions

Southern yellow billed hornbill, Pilanesberg National Park, North West Province, South Africa, Africa

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) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) challenger bull head detail at Gold Harbour on South Georgia Island, Polar Regions

Alerted springboks (Antidorcas marsupialis) watching a lioness (Panthera leo) walking, Nxai Pan National Park, Botswana, Africa

Galapagos Giant Tortoise (Chelonoidis chathamensis), can live for over 100 years, San Cristobal island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

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

Female Harpy eagle (Harpia harpyja), feeding her four month old chick, Alta Floresta, Amazon, Brazil, South America

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

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

Adult female polar bear (Ursus maritimus) yawning with mouth open on multi-year ice floes in Franz Josef Land, Russia, Eurasia

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

An adult polar bear (Ursus maritimus) leaping from ice floe to ice floe in the Svalbard Archipelago, Norway, Arctic, Europe

A curious young polar bear (Ursus maritimus) on ice floe in the Svalbard Archipelago, Norway, Arctic, Europe

Adult bull walrus (Odobenus rosmarus rosmarus) hauled out on the ice in the Svalbard Archipelago, Norway, Arctic, Europe

Adult bull walrus (Odobenus rosmarus rosmarus) hauled out on the beach in the Svalbard Archipelago, Norway, Arctic, Europe

Adult bull walrus (Odobenus rosmarus rosmarus) hauled out on the beach in the Svalbard Archipelago, Norway, Arctic, Europe

Adult Svalbard reindeer (Rangifer tarandus platyrhynchus) grazing within the town limits of Longyearbyen, Spitsbergen, Svalbard, Norway, Arctic, Europe

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on Genovesa (Tower) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Great frigatebird (Fregata minor) feeding on erupting green sea turtle (Chelonia mydas) hatchlings in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

Wild Galapagos giant tortoise (Geochelone elephantopus) feeding on the upslope grasslands of Santa Cruz Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) feeding on green sea turtle hatchlings, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) hunting for green sea turtle hatchlings in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

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

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecaudor, South America

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecaudor, South America

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecaudor, South America

Male Great frigatebird (Fregata minor) in flight against the nearly full moon on Genovesa (Tower) Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Greater flamingos (Phoenicopterus ruber) foraging for small pink shrimp in saltwater lagoon in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Black and white image of an Atlantic Puffin (Fratercula arctica), in Borgarfjaroarhofn, Iceland, Polar Regions

Adult Nazca booby (Sula grantii) with downy chick in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult red-footed booby (Sula sula) in flight in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult bull Galapagos sea lion (Zalophus wollebaeki) posturing on Fernandina Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Highland cow with its distinctive long hair and horns, a hardy rustic beef breed that has been exported all over the world, Duntulm, Trotternish Peninsula, Skye, Inner Hebrides, Scotland, United Kingdom, Europe

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

Adult voracious gecko (Gehyra vorax), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Guadalupe fur seals (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

An Indian Flying Fox (Pteropus medius) feeding in a tree on Havodda Island, Gaafu Dhaalu atoll, Maldives

Adult Antarctic tern (Sterna vittata) resting on the National Geographic Explorer near Tristan da Cunha, South Atlantic Ocean

Antarctic fur seal male and female (Arctocephalus gazella) at Stromness Bay on South Georgia, Polar Regions

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

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

King penguin (Aptenodytes patagonicus) detail at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

Adult brown pelican (Pelecanus occidentalis), in flight, Isla Carmen, Baja California Sur, Mexico, North America

Curious king penguin (Aptenodytes patagonicus) at breeding and nesting colony at Salisbury Plain in the Bay of Isles, South Georgia, Southern Ocean, 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

Bloody king penguin (Aptenodytes patagonicus) at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, 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

Adult macaroni penguin (Eudyptes chrysolophus) porpoising for speed while traveling to their breeding colony on South Georgia, Southern Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) swimming near the nesting beach at Salisbury Plain, 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

King penguin (Aptenodytes patagonicus) adult and chick at breeding and nesting colony at Salisbury Plain, 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

Herd of wild and semi-wild Yilki horses running in dust at sunset, Hacilar, Kayseri, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Southern giant petrel (Macronectes giganteus) cleaning itself on the water, South Georgia, Southern Ocean, Polar Regions

Cygnet with head underwater, fishing near a rowboat in Thorpness boating lake, Aldeburgh, Suffolk, United Kingdom

Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Guadalupe fur seal (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America