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

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

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

An introduced adult cane toad (Rhinella marina), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Adult black noddy (Anous minutus) breeding site on Boatswain Bird Island just off Ascension Island, South Atlantic Ocean

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

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

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

Adult black-browed albatross (Thalassarche melanophrys) in Elsehul on South Georgia, Southern Ocean, Polar Regions

Adult Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Southern Ocean, Polar Regions

Lake Sandoval and Aguaje palms, Tambopata National Reserve, Puerto Maldonado, Madre de Dios, Peru, South America

Gentoo penguin (Pygoscelis papua) adult with chicks at breeding colony on Booth Island, Antarctica, Southern Ocean, Polar Regions

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

Underwater scenes from the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult Galapagos flycatcher (Large-billed flycatcher) (Myiarchus magnirostris) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

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, and seals, South Georgia Island, Southern Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) at sunrise on South Georgia Island, Southern Ocean, Polar Regions

Man kneeeling to take a photo of an adult female green sea turtle (Chelonia mydas), coming ashore to nest on Isla Espiritu Santo, Sea of Cortez, Mexico, North America

Young woman relaxing in European spruce forest, near Villabassa in High Puster Valley, South Tyrol (Alto Adige), Italy

Golden jellyfish (Mastigias papua etpisoni), in Jellyfish Lake, a marine lake located on Eil Malk island, Rock Islands, Palau, Micronesia, Pacific

A Shelduck (Tadorna tadorna), on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Adult female Magellan goose (upland goose) (Chloephaga picta), on New Island in the Falkland Islands, South Atlantic Ocean, South America

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

Anhinga (anhinga anhinga) perching on branch by Lake Sandoval, Tambopata National Reserve, Puerto Maldonado, Madre de Dios, Peru, South America

Adult black guillemot (Cepphus grylle) at breeding site on Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

An adult ivory gull (Pagophila eburnea) on ringed seal kill on Spitsbergen in the Svalbard Archipelago, Norway, Arctic, Europe

The endemic candelabra cactus (Jasminocereus thouarsii) growing in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America

Lava lizard (Microlophus spp) in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) with a lava lizard on top of its head, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult yellow warbler (Dendroica petechia aureola) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The very colorful Galapagos land iguana (Conolophus subcristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Male Great frigatebird (Fregata minor) in breeding plumage with greenish metalic sheen to feathers) North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult red-footed booby (Sula sula) being attacked in flight by a great frigatebird (Fregata minor) in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos sea lion mother nursing pup (Zalophus wollebaeki) in the Galapagos Island Archipelago, 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

Adult red-footed booby (Sula sula) returning to the nest site with nest building material in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Young 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

Aerial of the Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Adult gentoo penguin (Pygoscelis papua), feeding chicks at Brown Bluff near the Antarctic Peninsula, Southern Ocean, Polar Regions

Adult brown pelican (Pelecanus occidentalis), plunge diving for fish, Isla Carmen, Baja California Sur, Mexico, North America

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

Adult Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Southern Ocean, Polar Regions

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

Adelie penguins (Pygoscelis adeliae) hauled out onto the ice near Adelaide Island, 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), foot detail, Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult green sea turtle (Chelonia mydas agassizii) underwater off the west side of Isabela, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Captive Galapagos giant tortoise (Geochelone elephantopus) at the Charles Darwin Research Station, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Stream and tree ferns, Mount Field National Park, UNESCO World Heritage Site, Tasmania, Australia, Pacific

Marbled White (Melanargia galathea) butterfly, adult roosting on grass, in meadow habitat, Kent, England, United Kingdom, Europe

Adelie penguin (Pygoscelis adeliae), with chicks at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions

A large pod of Gerlache Strait type B killer whales (Orcinus orca), traveling and socializing in Gerlache Strait, Antarctica, Polar Regions

Adult female polar bear (Ursus maritimus) walking on multi-year ice floes in Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult black-legged kittiwakes (Rissa tridactyla) feeding at the base of a glacier in the Svalbard Archipelago, Norway, Arctic, Europe

Adult black-legged kittiwakes (Rissa tridactyla) resting on ice in the Svalbard Archipelago, Barents Sea, Norway, Arctic, Europe

Views of the Vasilievbreen (Vasiliev Glacier), in Isbukta (Ice Bay) near the island of Spitsbergen in Svalbard, Norway, Arctic, Europe

Adult Swallow-tailed gull (Creagrus furcatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult Galapagos brown pelican (Pelecanus occidentalis urinator) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Red mangrove plants (Rhizophora mangle), at low tide near the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Adult wandering albatross (Diomedea exulans) in flight near the Tristan da Cunha Group, South Atlantic Ocean

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

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

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

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

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, 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 male yellow warbler (Dendroica petechia aureola) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

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

Blue-footed boobies (Sula nebouxii), on a small islet near Isla Salsipuedes, Baja California, Sea of Cortez, Mexico, North America

Killer whale female (Orcinus orca), surfacing off Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America

California sea lions (Zalophus californianus), stampeding on the beach in Puerto Refugio, Baja California, Sea of Cortez, Mexico, North America

View of African elephant in its natural habitat on game drive in Kruger National Park, South Africa, Africa

View of African elephant in its natural habitat, on game drive in Kruger National Park, South Africa, Africa