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Mating Orchard Butterflies, Papilio aegeus aegeus, Queensland, Australia
East African black rhinoceros (rhinos) sparring, San Diego Wild Animal Park, California, United States of America, North America
Bigfin reef squid (Sepioteuthis lessoniana), tending eggs which have been laid along a buoy line, taken at dusk, Lembeh Strait, Indonesia, Southeast Asia, Asia
Bigfin reef squid (Sepioteuthis lessoniana), tending eggs which have been laid along a buoy line, taken at dusk, Lembeh Strait, Indonesia, Southeast Asia, Asia
Bigfin reef squid (Sepioteuthis lessoniana) tending eggs which have been laid along a buoy line, taken at dusk, Lembeh Strait, Indonesia, Southeast Asia, Asia
Red-billed gull (Chroicocephalus scopulinus) in gannet breeding colony at Cape Kidnappers, Napier, North Island, New Zealand, Pacific
Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland
Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland
Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland
Elegant tern (Thalasseus elegans) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Elegant tern (Thalasseus elegans) and Heermann's gull (Larus heermanni) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Elegant tern (Thalasseus elegans) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Elegant tern (Thalasseus elegans) and Heermann's gull (Larus heermanni) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Heermann's gulls (Larus heermanni) mating, Isla Rasa, Gulf of California (Sea of Cortez), Mexico, North America
Dragonflies mating, Santa Cruz Island, Galapagos Islands, Ecuador, South America
Mating display by pair of Wire-net filefish (Cantherhines paradalis), Queensland, Australia, Pacific
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Social bahavior of Sperm Whale, Physeter macrocephalus, Caribbean Sea, Dominica
Elegant tern (Thalasseus elegans) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Red-billed gulls (Chroicocephalus scopulinus), breeding colony near Dunedin, Otago, South Island, New Zealand, Pacific
Heermann's gulls (Larus heermanni) mating, Isla Rasa, Gulf of California (Sea of Cortez), Mexico, North America
Elegant terns (Thalasseus elegans) mating, Isla Rasa, Gulf of alifornia (Sea of Cortez), Baja California, Mexico, North America
Elegant tern (Thalasseus elegans) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Elegant tern (Thalasseus elegans) breeding colony, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
Elegant terns (Thalasseus elegans) mating, Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America
King penguins (Aptenodytes patagonicus) in mating ritual, Volunteer Point, East Falkland, Falkland Islands, South Atlantic, South America
Polar bear (Ursus maritimus), Hudson Bay, Churchill, Manitoba, Canada, North America
Two mandarinfish spawn and release eggs, Anilao, Philippines.
A pair of cuttlefish mating over a coral reef, Raja Ampat, Indonesia.
Three male Indo-Pacific bottlenose dolphins (Tursiops aduncus), and one female dolphin breeding, Red Sea.
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) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific
Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific
Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific
Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific
A small pod of beluga whales (Delphinapterus leucas), consisting of several males and one lone female mating, Svalbard, Norway, Europe
Lava lizard (Microlophus spp) courtship behavior in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America
Adult Swallow-tailed gull (Creagrus furcatus) 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 Genovesa (Tower) Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
A lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica, Polar Regions
Malachite kingfisher pair, (Corythornis cristatus), after digging in mud, Chobe National Park, Botswana
Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia
Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia
Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead fur seal pup at St. Andrews Bay, South Georgia
Two East African land snail (Giant African land snail) (Achatina fulica) mating, Addo Elephant National Park, South Africa, Africa
Adult bull southern elephant seal (Mirounga leonina) flipping sand onto its back to cool off on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean
Dead southern elephant seal (Mirounga leonina) pup being eaten by an Antarctic skua on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Adult Grey-headed Albatross (Thalassarche chrysostoma) courtship display at Elsehul, South Georgia
Blue footed booby (sula nebouxii) incubating eggs at Punta Pitt, San Cristobal Island, Galapagos, UNESCO, Ecuador
Scarlet Macaws (Ara macao) in flight, Osa Peninsula, Corcovado N.P, Costa Rica
Red-eyed Tree frogs (Agalychins callydrias) together, Costa Rica
Chameleon, Nosy Be island, Republic of Madagascar, Indian Ocean
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands
Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) returning to the colony with nesting material, Falkland Islands
Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) returning to the colony with nesting material, Falkland Islands
Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) returning to the colony with nesting material, Falkland Islands
Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) exhibiting intense breeding plumage, New Island, Falkland Islands
Adult male long-tailed meadowlark (Sturnella loyca) in breeding plumage on New Island in the Falkland Islands
Black-browed albatross (Thalassarche melanophrys) breeding colony on Steeple Jason Island in the Falkland Islands
Black-browed albatross (Thalassarche melanophrys) breeding colony on Steeple Jason Island in the Falkland Islands
Black-browed albatross (Thalassarche melanophrys) breeding colony on Carcass Island in the Falkland Islands
Black-browed albatross (Thalassarche melanophrys) breeding colony on New Island in the Falkland Island.
Adult male long-tailed meadowlark (Sturnella loyca) in breeding plumage on New Island in the Falkland Islands
Magellanic penguins (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina
Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina
Magellanic penguins (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina
Male and female Red-legged Honeycreeper (Cyanerpes cyaneus) on a branch, Costa Rica
Adult brown bear pair (Ursus arctos) exhibiting courtship behavior at Scidmore Cut in Glacier Bay National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) courtship behaviour, Brooks River, Katmai National Park near Bristol Bay, Alaska, United States of America
Adult arctic tern (Sterna paradisaea) male bringing female a fish, Spitsbergen Island in the Svalbard Archipelago, Norway
Adult arctic tern (Sterna paradisaea) male bringing female a fish, Spitsbergen Island in the Svalbard Archipelago, Norway
Mother polar bear (Ursus maritimus) and cub-of-the-year disputing then allowing a male bear to feed on a fin whale, Svalbard Archipelago, Norway
Adult red-necked phalaropes (Phalaropus lobatus) in breeding plumage on Flatey Island, Iceland
Southern elephant seals (Mirounga leonina) mating, St. Andrews Bay, South Georgia, Polar Regions
Gentoo penguins (Pygoscelis Papua), performing a mating ritual in the Antarctic peninsula, Antarctica, Polar Regions
A male and female lion (Panthera leo) mating in Serengeti National Park, UNESCO World Heritage Site, Tanzania, East Africa, Africa