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

An adult Galapagos dove (Zenaida galapagoensis) on Espanola Island 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

Snorkeler with Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

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

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

A curious young polar bear (Ursus maritimus) approaches the National Geographic Explorer in the Svalbard Archipelago, Norway, Arctic, Europe

Jungle myna (Acridotheres fuscus), looking for water at the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Vanikoro flycatcher (Myiagra vanikorensis), looking for insects at the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Polar bear (Ursus Maritimus) on Axel Heiberg island, Nunavut, Canadian Arctic, Canada, North America

Polar bear (Ursus Maritimus) on Axel Heiberg island, Nunavut, Canadian Arctic, Canada, North America

Galapagos Marine Iguana (Amblyrhynchus cristatus) Santa Cruz island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Cliff views south of Naji Point on the North Rim of Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Caspian Terns (Hydroprogne caspia) at breeding colony on Ile des Oiseaux in the Parc National du Delta du Saloum, UNESCO World Heritage Site, Senegal, West Africa, Africa

Antarctic fur seal pup (Arctocephalus gazella) on Salisbury Plain on South Georgia, Southern Ocean, Polar Regions

Antarctic fur seal pup (Arctocephalus gazella) on Prion Island in the Bay of Isles on South Georgia, Southern Ocean, Polar Regions

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

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

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia in the Southern Ocean, Polar Regions

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia, Polar Regions

Adelie penguins (Pygoscelis adeliae), at breeding colony at Brown Bluff on the eastern side of the Antarctic Peninsula, Antarctica, Polar Regions

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

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

Adult Commerson's dolphin (Cephalorhynchus commersonii) surfacing, Carcass Island in the Falkland Islands, South America

Adult Commerson's dolphins (Cephalorhynchus commersonii) surfacing, Carcass Island in the Falkland Islands, South America

Adult macaroni penguins (Eudyptes chrysolophus) plunging into the sea leaving their breeding colony at Elsehul on South Georgia, Southern Ocean, Polar Regions

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

African openbill (Anastomus lamelligerus), Zimanga Game Reserve, KwaZulu-Natal, South Africa, Africa

African openbill (Anastomus lamelligerus), Zimanga Game Reserve, KwaZulu-Natal, South Africa, Africa

A lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica, Polar Regions

Adult brown skuas (Catharacta antarctica) feeding on a penguin carcass near the Antarctic peninsula, Antactica, Polar Regions

Adult cape petrels (Daption capense) feeding near Deception Island, Antarctica, Southern Ocean, Polar Regions

Adult cape petrels (Daption capense) feeding near Deception Island, Antarctica, Southern Ocean, Polar Regions

Humpback whale (Megaptera novaeangliae) surfacing in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Yellow-spotted river turtles (Podocnemis unifilis), Lake Sandoval, Tambopata National Reserve near Puerto Maldonado, Peru, South America

Tufts of grass and El Misti and Chachani volcanoes, Salinas y Aguada Blanca National Reserve, Arequipa Region, Peru, South America

An adult bull among a pod of about 20 killer whales (Orcinus orca) in Antarctic Sound near the Antarctic Peninsula, Polar Regions

Adelie penguin (Pygoscelis adeliae) breeding colony at Brown Bluff on the eastern side of the Antarctic Peninsula, Antarctica, Polar Regions

First year Adelie penguin (Pygoscelis adeliae) chicks at breeding colony at Brown Bluff, Antarctica, Polar Regions

Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean, Polar Regions

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus), foot detail, Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

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

Chimpanzee (Pan troglodytes), Gombe Stream National Park, Lake Tanganyika, Tanzania, East Africa, Africa

Adelie penguin (Pygoscelis adeliae) on ice near Devil Island in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Adelie penguin (Pygoscelis adeliae) in snowstorm at Brown Bluff on the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions

Adult South Georgia pipit (Anthus antarcticus) feeding at low tide on Prion Island, Bay of Isles, South Georgia, Polar Regions

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

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

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

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

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

King penguin (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

Adult female southern elephant seal (Mirounga leonina) flipping sand onto its back to cool off on South Georgia Island, Southern Ocean

Skuas (Catharacta antarctica) and female southern elephant seal with newborn pup near abandoned whaling station, Stromness Bay, South Georgia

An adult mangrove swallow (Tachycineta albilinea), on New River near the Mesoamerican archaeological site of Lamanai, Belize

Adult gentoo penguin (Pygoscelis papua) with minutes-old newly hatched chick at Gold Harbor on South Georgia

Adult gentoo penguin (Pygoscelis papua) feeding minutes-old newly hatched chick at Gold Harbor on South Georgia

Yellow-footed gull (Larus livens), eggs in nest on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Killer whale pod (Orcinus orca), off Punta Colorada, Isla San Jose, Baja California Sur, Mexico, North America

Mangroves in front of the King Leopold sandstone formations, Hunter River, Frederick Harbor, Kimberley, Western Australia, Australia, Pacific

An adult eastern osprey (Pandion haliaetus cristatus), in flight over Montgomery Reef, Kimberley, Western Australia, Australia, Pacific

Snorkeler with moon jellyfish (Aurelia sp), in Jellyfish Lake, located on Eil Malk island, Rock Islands, Palau, Micronesia, Pacific

A young saltwater crocodile (Crocodylus porosus), sunning itself on the banks of Porosus Creek, Kimberley, Western Australia, Australia, Pacific

An adult Pacific reef heron (Egretta sacra), hunting for prey on Montgomery Reef, Kimberley, Western Australia, Australia, Pacific

A long-beaked common dolphin pod (Delphinus capensis), traveling off Gorda Banks, Baja California Sur, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

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

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

Southern Right Whale (Eubalaena australis) adult surfacing near Puerto Pyramides, Peninsula Valdez, Argentina

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