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Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina
Adult Swallow-tailed gull (Creagrus furcatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
King penguin (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions
American oystercatcher (Haematopus palliatus), on Isla Espiritu Santo, Baja California Sur, Sea of Cortez, Mexico, North America
Heermann's gulls (Larus heermanni), quarreling at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica
Heermann's gull (Larus heermanni), at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica
Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina
Adult king penguins (Aptenodytes patagonicus) returning to sea from the nesting colony at Salisbury Plain, South Georgia, Polar Regions
Osprey (Pandion haliaetus), in flight to its nest, Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America
Adult southern rockhopper penguins (Eudyptes chrysocome), at breeding colony on West Point Island, Falklands, South America
Adult chinstrap penguin (Pygoscelis antarctica), at breeding colony at Half Moon Island, Antarctica, Polar Regions
Heermann's gulls (Larus heermanni), at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica
Adult brown pelican (Pelecanus occidentalis), taking flight on a small islet near Isla Salsipuedes, Baja California, Mexico, North America
Shag (Phalacrocorax aristotelis) with young. Farne Islands, Northumberland, UK
Adult elegant tern (Thalasseus elegans), looking for fish on Isla Carmen, Baja California Sur, Sea of Cortez, Mexico, North America
An injured bull California sea lion (Zalophus californianus), hauled out on Isla San Pedro Martir, Sea of Cortez, Mexico, North America
Gannet (Morus bassanus) landing with nesting material. Bass Rock, Scotland
Yellow-footed gull (Larus livens), on its nest on Isla San Esteban, Baja California, Sea of Cortez, Mexico, North America
Kittiwakes (Larus tridactyla), on nests. Farne Islands, Northumberland, UK
Gannet (Morus bassanus) on nest. Bass Rock, Scotland
Gannet (Morus bassanus) on nest. Bass Rock, Scotland
Gannet (Morus bassanus). Bass Rock, Scotland
Gannets (Morus bassanus) carrying seaweed for nesting material. Bass Rock, Scotland
Gannet (Morus bassanus) landing. Bass Rock, Scotland
Gannet (Morus bassanus) on nest. Bass Rock, Scotland
Gannet (Morus bassanus) on nests. Bass Rock, Scotland
Kittiwakes (Larus tridactyla), on nests. Farne Islands, Northumberland, UK
Ringed plover (Charadrius hiaticula) on nest. Farne Islands, Northumbelrand, UK
Shags on nests (Phalacrocorax aristotelis). Farne Islands, Northumberland, UK
King penguins (aptenodytes patagonicus) right whale bay, south georgia, in snowy landscape
King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape
King penguins (aptenodytes patagonicus) right whale bay, south georgia, group huddled together in blizzard
King penguins (aptenodytes patagonicus) right whale bay, south georgia, group huddled together in snowy landscape
King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape
King penguins (aptenodytes patagonicus) st andrews bay, south georgia, group in snowy landscape
Gentoo penguins (pygoscelis papua) new island, falkland islands, walking back to the colony after fishing at sea.
King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape
King penguins (aptenodytes patagonicus) right whale bay, south georgia, in snowy landscape
Red-breasted goose (Branta ruficollis) group approaching on land, captive, WWT Slimbridge, Gloucestershire, UK.
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) split view underwater in the Galapagos Island Group, Ecuador
A younger polar bear (Ursus maritimus) scavenging a fresh bearded seal kill, Monacobreen Glacier, Spitsbergen, Norway
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on North Seymour Island in the Galapagos Island Archipelago, Ecuador
Great frigatebird (Fregata minor) taking handouts from a fisherman in Puerto Ayora on Santa Cruz Island, in the Galapagos Island Archipelago, Ecuador
King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean.
Adult red-billed tropicbird (Phaethon aethereus) in flight in the Galapagos Island Archipelago, Ecuador
Yellow-footed Gull (Larus livens) eating clams at low tide in Puerto Don Juan in the Gulf of California (Sea of Cortez), Mexico
Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on North Seymour Island in the Galapagos Island Archipelago, Ecuador
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on North Seymour Island in the Galapagos Island Archipelago, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Island Archipelago, Ecuador
Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean
Northern fulmar (Fulmarus glacialis glacialis) on the wing in the Svalbard Archipelago, Norway
Adult Bulwer's Petrel (Bulweria bulwerii) in flight just south of The Madeira Islands, Portugal in the North Atlantic Ocean
Adelie penguin (Pygoscelis adeliae) tobogganing near the Antarctic Peninsula, Antarctica.
Male great frigatebird (Fregata minor) in breeding plumage in the Galapagos Island Archipelago, Ecuador
Blue-footed booby (Sula nebouxii) plunge-diving underwater in the Galapagos Island Group, Ecuador. The Galapagos are a nesting and breeding area for blue-footed boobies.
Great frigatebird (Fregata minor) chick in the nest in the Galapagos Island Archipelago, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Adult black-necked stilt (Himantopus mexicanus) wading and feeding in a brackish water lagoon at Punta Cormorant on Floreana Island, Galapagos, Ecuador, Pacific Ocean.
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater near snorkeler in the Galapagos Island Group, Ecuador
Black-browed albatross (Thalassarche melanophrys) breeding colony on Steeple Jason Island in the Falkland Islands, South Atlantic Ocean
Adult Galapagos penguin (Spheniscus mendiculus) split view underwater in the Galapagos Island Group, Ecuador
Wilson's storm-petrel (Oceanites oceanicus) daintily feeding in the calm waters of Neko Harbour on the Antarctic Peninsula
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on Genovesa (Tower) Island, in the Galapagos Island Archipelago, Ecuador
Adult Bulwer's Petrel (Bulweria bulwerii) in flight just south of The Madeira Islands, Portugal in the North Atlantic Ocean
Lindblad Expeditions guests on board the National Geographic Explorer with a lone adult emperor penguin (Aptenodytes forsteri) on sea ice, Antarctica
Curious king penguin (Aptenodytes patagonicus) breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean.
Blue-footed booby (Sula nebouxii) plunge-diving underwater in the Galapagos Island Group, Ecuador. The Galapagos are a nesting and breeding area for blue-footed boobies.
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador
Great frigatebird (Fregata minor) taking handouts from a fisherman in Puerto Ayora on Santa Cruz Island, in the Galapagos Island Archipelago, Ecuador
Southern elephant seal (Mirounga leonina) pup (often called "weaners" once their mothers stop nursing them) on South Georgia Island in the Southern Ocean
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Researchers from OCEANITES counting penguins from the Lindblad Expedition ship National Geographic Explorer (shown here is )working in Antarctica
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Island Archipelago, Ecuador
Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Island Archipelago, Ecuador
Wilson's storm-petrel (Oceanites oceanicus) daintily feeding in the calm waters of Neko Harbour on the Antarctic Peninsula
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on Genovesa (Tower) Island, in the Galapagos Island Archipelago, Ecuador
Adult emperor penguin (Aptenodytes forsteri) foot print on frsh snow near Snow Hill Island in the Weddell Sea, Antarctica.
A well-scarred old male polar bear (Ursus maritimus) on a fresh bearded seal kill near Monacobreen Glacier, Spitsbergen in the Svalbard Archipelago, Norway
Adult macaroni penguin (Eudyptes chrysolophus) in Elsehul Bay on South Georgia, Southern Ocean
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) split view underwater in the Galapagos Island Group, Ecuador
King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean.
Adult great skua (Stercorarius skua) being dive-bombed by defensive arctic terns (Sterna paradisaea) guarding their nest sites in the Svalbard Archipelago, Norway
The Fuglefjellet cliffs (411m) on Bear Island (Bjornoya) in the Svalbard Archipelago, Norway. MORE INFO These cliffs form the highest seabird cliffs in the North Atlantic Ocean.
Adult waved albatross (Diomedea irrorata) courtship display at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador. Pacific Ocean
Adult Bulwer's Petrel (Bulweria bulwerii) in flight just south of The Madeira Islands, Portugal in the North Atlantic Ocean
King penguin (Aptenodytes patagonicus) breeding and nesting colony at Salisbury Plains in the Bay of Isles, South Georgia, Southern Ocean.
Lindblad Expeditions guests with a lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica.
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador
Male Great frigatebird (Fregata minor) in breeding plumage (note the red gular pouch) on Genovesa (Tower) Island, in the Galapagos Island Archipelago, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) split view underwater in the Galapagos Island Group, Ecuador
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Island Archipelago, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Adult male great frigate bird (Fregata minor) with inflated gular on North Seymour Island in the Galapagos Island Group, Ecuador. Pacific Ocean
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador