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Elegug Stacks, occupied by a colony of Guillemots, Pembrokeshire Coast National Park, Wales, United Kingdom, Europe

Great Egret (Ardea alba) on left and little egret (Egretta garzetta) at Nosara Beach and river mouth, Nosara, Guanacaste, Costa Rica, Central America

Vultures wait to steal eggs as Olive Ridley turtle digs nest at this refuge, Ostional, Nicoya Peninsula, Guanacaste, Costa Rica, Central America

Transient killer whale (Orcinus orca) breaching in the Monterey Bay National Marine Sanctuary, California, United States of America, North America

A mother sea otter (Enhydra lutris) with her pup in Reid Inlet, Glacier Bay National Park, Southeast 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

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

American Oystercatcher (Haematopus palliatus), Playa Arco Beach, Uvita, Marino Ballena National Park, Pacific Coast Costa Rica, Central America

Juvenile bald eagle (Haliaeetus leucocephalus), on king crab pots in the town of Dutch Harbor, Unalaska Island, Alaska, United States of America, North America

Short-finned pilot whale (Globicephala macrorhynchus), underwater off Isla San Marcos, Baja California Sur, Mexico, North America

Short-finned pilot whale (Globicephala macrorhynchus), underwater off Isla San Marcos, Baja California Sur, Mexico, North America

Short-finned pilot whale (Globicephala macrorhynchus), tail-lobbing off Isla San Marcos, Baja California Sur, Mexico, North America

Short-finned pilot whale (Globicephala macrorhynchus), underwater off Isla San Marcos, Baja California Sur, Mexico, North America

Adult sperm whale (Physeter macrocephalus) diving off Isla San Jose, Baja California Sur, Mexico, North America

Juvenile whale shark (Rhincodon typus), underwater near Los Islotes, Baja California Sur, Mexico, North America

Juvenile whale shark (Rhincodon typus), underwater near Los Islotes, Baja California Sur, Mexico, North America

Seal and seabird look at each other on a rock in the calm sea, near Alert Bay, Inside Passage, British Columbia, Canada, North America

Steller sea lions (Eumetopias jubatus) on a rocky shore, Alert Bay, Inside Passage, British Columbia, Canada, North America

Humpback whale (Megaptera novaeangliae), feeding at the surface, Alert Bay, Inside Passage, British Columbia, Canada, North America

Adult chinstrap penguins (Pygoscelis antarcticus), porpoising through the sea in Cooper Bay, South Georgia, Polar Regions

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

King penguin (Aptenodytes patagonicus) chicks called Okum Boys at Gold Harbor, 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) 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

Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), sounding a challenge on the beach at Gold Harbor, South Georgia, Polar Regions

A pod of Type A killer whales (Orcinus orca), surfacing off the northwest coast of South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), on the beach at sunrise in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), sounding a challenge on the beach at Gold Harbor, South Georgia, Polar Regions

Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), in the tussah grass at Salisbury Plain, South Georgia, Polar Regions

Female southern elephant seal with young male (Mirounga leoninar), on the beach at Salisbury Plain, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), on the beach at sunrise in Gold Harbor, South Georgia, Polar Regions

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

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

Southern elephant seal pup (Mirounga leoninar), on the beach at dawn in Gold Harbor, South Georgia, Polar Regions

A pod of Type A killer whales (Orcinus orca), surfacing off the northwest coast of South Georgia, Polar Regions

Young southern elephant seals (Mirounga leoninar), sleeping near a river, St. Andrews Bay, South Georgia, Polar Regions

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

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

Rusting machinery and buildings at the abandoned whaling station at Stromness Harbor, South Georgia, Polar Regions

A pair of adult fin whales (Balaenoptera physalus) surfacing in Kenai Fjords National Park, Alaska, United States of America, North America

Southern Rockhopper penguin rookery (Eudyptes chrysocome), New Island, Falkland Islands, British Overseas Territory, South America

California gulls (Larus californicus) feeding on tuna crabs, Isla Magdalena, Baja California Sur, Mexico, North America

Adult bottlenose dolphins (Tursiops truncatus), flukes-up diving in Bahia Magdalena, Baja California Sur, Mexico, North America

Adult bottlenose dolphins (Tursiops truncatus) bowriding underwater, Isla San Pedro Martir, Baja California, Mexico, North America

A feeding frenzy of sea birds diving on small baitfish near Isla San Pedro Esteban, Baja California, Mexico, North America

California gray whale (Eschrichtius robustus), with whale watchers, San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watcher with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watchers with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whales (Eschrichtius robustus), courtship behavior, San Ignacio Lagoon, Baja California Sur, Mexico, North America

An adult humpback whale (Megaptera novaeangliae), flukes-up dive near boat in Kenai Fjords National Park, Alaska, United States of America, North America

Juvenile yellow-footed gull (Larus livens), eating a goatfish, Isla San Ildefonso, Baja California, Mexico, North America

Adult Munk's pygmy devil ray, Mobula munkiana, leaping into the air, Isla San Jose, Baja California Sur, Mexico, North America

Adult Munk's pygmy devil ray (Mobula munkiana), leaping into the air, Ensenada Grande, Isla Partida, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), filter feeding near snorkeler at El Mogote, Baja California Sur, Mexico, North America

A young whale shark (Rhincodon typus), near kayaker in Bahia Coyote, Conception Bay, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), filter feeding near the surface at El Mogote, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), filter feeding near the surface at El Mogote, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), filter feeding near snorkeler at El Mogote, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), being biopsied by researcher at El Mogote, Baja California Sur, Mexico, North America

A young whale shark (Rhincodon typus), near kayaker in Bahia Coyote, Conception Bay, Baja California Sur, Mexico, North America

Adult polar bear (Ursus maritimus), reflected in the sea on ice near Ellesmere Island, Nunavut, Canada, North America

Adult Atlantic walrus (Odobenus rosmarus), on the beach in Musk Ox Fjord, Ellesmere Island, Nunavut, Canada, North America

Adult Atlantic walrus (Odobenus rosmarus), on the beach in Musk Ox Fjord, Ellesmere Island, Nunavut, Canada, North America

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

Black-browed albatross (Thalassarche melanophris), in flight in Drake Passage, Antarctica, Polar Regions

A group of Adelie penguins (Pygoscelis adeliae) on sea ice in Duse Bay, Weddell Sea, Antarctica, Polar Regions

Polar bear cubs of the year (Ursus maritimus), foraging for food with mother nearby, Cape Brewster, Greenland, Polar Regions

Adult bull killer whale (Orcinus orca), power-lunging while feeding on fish along the coast of eastern Greenland, Polar Regions

Adult humpback whale (Megaptera novaeangliae), surfacing with spout in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive at sunset in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lion (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lions (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Curious Steller sea lions (Eumetopias jubatus), South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Crowds of Guillemots (Uria aalge), on Staple Island, in the Farne Islands, Northumberland, northeast England, United Kingdom, Europe

An adult crabeater seal (Lobodon carcinophaga), hauled out on the ice in Antarctic Sound, Weddell Sea, Antarctica, Polar Regions

Chinstrap penguins (Pygoscelis antarcticus), on the beach at Coronation Island, South Orkney Islands, Antarctica, Polar Regions

Adelie penguin (Pygoscelis adeliae), porpoising in the sea in Antarctic Sound, Trinity Peninsula, Antarctica, Polar Regions

An adult crabeater seal (Lobodon carcinophaga), hauled out on the ice in Antarctic Sound, Weddell Sea, Antarctica, Polar Regions

Adult crabeater seals (Lobodon carcinophaga), hauled out on the ice in Antarctic Sound, Weddell Sea, Antarctica, Polar Regions