Breeding pair of Chilean skuas (Stercorarius chilensis), Seno Agostini Fjord, Strait of Magellan, Patagonia, Chile, South America

Breeding pair of kelp geese (Chloephaga hybrida), Wildlife Conservation Society Preserve of Karukinka, Strait of Magellan, Chile, South America

A pair of mandarinfish mating, Cebu, Philippines.

Nesting puffin pair, United Kingdom, Europe

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

Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe

Breeding pair of Shags (Gulosus aristotelis) by their nest on cliffs at Braes peninsula, a red listed bird, The Braes, Portree, Skye, Inner Hebrides, Scotland, United Kingdom, Europe

A pair of cuttlefish mating over a coral reef, Raja Ampat, Indonesia.

Adult southern rockhopper penguins (Eudyptes chrysocome), at breeding colony on West Point Island, Falklands, South America

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Imperial Shag (Phalacrocorax atriceps), pair exhibiting courtship behavior on New Island in the Falkland Islands, South America

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

A pair of vibrant nudibranchs, Nembrotha kubaryana, mate on a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Antarctic shag (Phalacrocorax atriceps bransfieldensis), pair on nest at breeding site at Jougla Point, Antarctica, Polar Regions

Adult king penguin pair (Aptenodytes patagonicus) at breeding colony at Gold Harbor, South Georgia Island, Polar Regions

Gentoo penguin pair (Pygoscelis papua), mating at breeding colony site on Cuverville Island, Antarctica, Polar Regions

Magellanic penguin (Spheniscus magellanicus), a pair of breeding penguins on their nest, Patagonia, Chile, South America

Breeding pair of kelp geese (Chloephaga hybrida), Wildlife Conservation Society Preserve of Karukinka, Strait of Magellan, Chile, South America

Common darter dragonfly (sympetrum striolatum) pair mating on grass stem, oxfordshire, uk

Common darter dragonfly (sympetrum striolatum) close-up of pair mating, oxfordshire, uk

European Bee-eater (Merops apiaster) pair perched on sand bank at nest hole, Bulgaria

European Bee-eater (Merops apiaster) pair perched together on twig, Bulgaria

King Penguins on Salisbury Plain, South Georgia, with passengers from an expedition cruise.

A pair of Black Browed Albatross (Thalassarche melanophris) Allopreening to reinforce the pair bond in a nesting colony on Westpoint island in the Falkland Islands off Argentina, in South America. Albatrosses are globally thratened by long line fishing boats who are responsible for killing thousands of birds.

A pair of Black Browed Albatross (Thalassarche melanophris) Allopreening to reinforce the pair bond in a nesting colony on Westpoint island in the Falkland Islands off Argentina, in South America. Albatrosses are globally thratened by long line fishing boats who are responsible for killing thousands of birds.

A pair of Black Browed Albatross (Thalassarche melanophris) Allopreening to reinforce the pair bond in a nesting colony on Westpoint island in the Falkland Islands off argentina, in South America. Albatrosses are globally thratened by long line fishing boats who are responsible for killing thousands of birds.

Common darter dragonfly (sympetrum striolatum) pair mating, oxfordshire, uk

European Bee-eater (Merops apiaster) pair perched on branch, facing each other, Bulgaria

Bewicks swan (cygnus columbianus) pair mating on water, slimbridge, uk

Common darter dragonfly (sympetrum striolatum) pair mating on thistle plant, oxfordshire, uk

Mute Swan, Hoeckerschwan, Cygnus olor, breeding, Switzerland

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island in the Southern Ocean

Adult Antarctic Shag, (Phalacrocorax (atriceps) bransfieldensis) from breeding colony on the Antarctic Peninsula

Blue-footed booby (Sula nebouxii) pair in courtship ritual in the Galapagos Island Group, Ecuador. The Galapagos are a nesting and breeding area for blue-footed boobies.

Clouded Yellow Butterflies mating (Colias croceus). Jersey, British Channel Islands, UK

King Penguin (Aptenodytes patagonicus) breeding and nesting colonies on South Georgia Island, Southern Ocean.

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, Ecuador

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Adult male magnificent frigatebirds (Fregata magnificens) on the wing near breeding colony on Isla Magdalena, Bahia de Magdalena, Baja California Sur, Mexico.

King Penguin (Aptenodytes patagonicus) breeding and nesting colonies on South Georgia Island, Southern Ocean.

Two adult Humpback whales courting, Vava'u Tonga in the South Pacific

Humpback male and female adults courting above the shallow reef, Vava'u Tonga, South Pacific

Chinstrap penguin (Pygoscelis antarctica) chick head detail at colony on Useful Island near the Antarctic Peninsula. There are an estimated 2 million breeding pairs of chinstrap penguins in the Antarctic peninsula region alone, perhaps as many as 7.5 million breeding pairs in all of Antarctica. Their name derives from the narrow black band under their heads which makes it appear as if they are wearing black helmets, making them one of the most easily identified types of penguin. Other names for them are "Ringed Penguins", "Bearded Penguins", and "Stonecracker Penguins" due to their harsh call. They grow to 68 cm (27 in). The average adult weight of a Chinstrap Penguin is 4.5 kg (10 lbs). Weight can range from 3 to 6 kg (6.6-13.2 lbs), with males being slightly larger and weight varying based on where the penguin is in the breeding cycle. Their diet consists of krill, shrimp, and fish. On land they build circular nests from stones, and lay two eggs, which are incubated by both the male and the female for shifts of five to ten days. They can also breed on icebergs, though they prefer non-icy conditions. The chicks hatch after about 35 days, and have fluffy gray backs and white fronts. The chicks stay in the nest for 20?30 days before they go to join a creche. At around 50?60 days old, they moult, gaining their adult plumage and go to sea. The Chinstrap Penguin was first described by German naturalist Forster in 1781. Its specific epithet was often seen as antarctica, however a 2002 review determined the genus Pygoscelis was masculine, and hence the correct binomial name is Pygoscelis antarcticus.

Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island in the Southern Ocean

Painted Locust (Schistocerca melanocera) mating in the Galapagos Island Archipelago, Ecuador

Curious king penguin (Aptenodytes patagonicus) breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean.

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Adult waved albatross (Diomedea irrorata) courtship display at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador. Pacific Ocean

Male great frigate bird (Fregata minor) displaying to each other on nesting and breeding site on North Seymour Island in the Galapagos Island Group, Ecuador. Pacific Ocean

Butter hamlets mating at sunset, Cayman Islands

Adult green sea turtles (Chelonia mydas agassizii) mating (male on top of female) in the waters surrounding the Galapagos Island Archipeligo, Ecuador. Pacific Ocean.

Adult puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland

King penguin (Aptenodytes patagonicus) adult and chick at breeding and nesting colony at Salisbury Plains in the Bay of Isles, South Georgia, Southern Ocean.

Magellanic penguins (Spheniscus magellanicus) on the beach at a breeding and molting site on Carcass Island, Falkland Islands, South Atlantic

A pair of adult Barrow's Goldeneye (Bucephala islandica) in full breeding plumage in the calm waters of Red Bluff Bay, Southeastern Alaska, USA

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Adult Antarctic Shag, (Phalacrocorax (atriceps) bransfieldensis) from breeding colony on the Antarctic Peninsula

Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

Adult brown noddy (Anous stolidus) pair nesting on cliff face of Champion Island in the Galapagos Island Group. Champion Island is a nesting and breeding area for brown noddies, Pacific Ocean.

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

Adult puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland

Blue-footed booby (Sula nebouxii) pair on Punta Suarez on Espanola Island in the Galapagos Island Group, Ecuador. The Galapagos are a nesting and breeding area for blue-footed boobies.

Adult Antarctic Shag, (Phalacrocorax (atriceps) bransfieldensis) from breeding colony on the Antarctic Peninsula

Blue-footed booby (Sula nebouxii) pair on Punta Suarez on Espanola Island in the Galapagos Island Group, Ecuador. The Galapagos are a nesting and breeding area for blue-footed boobies.

Wild Boar (Sus Scrofa), wild. Bandhavgarh Tiger Reserve, India

Adult puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland

Common Frogs mating (Rana temporaria). Sark, British Channel Islands, UK

Adult Black-browed albatross (Thalassarche melanophrys) feeding and preening chick at breeding colony on New Island in the Falkland Islands, Southern Atlantic Ocean

Adult puffin (Fratercula arctica) during breeding season in Isfjardardjup, Northwestern Iceland

Adult long-tailed ducks (Clangula hyemalis) in breeding plumage in the Svalbard Archipelago, Norway

Black-browed albatross (Thalassarche melanophrys) chick on nest at breeding colony on New Island in the Falkland Islands, Southern Atlantic Ocean

Adult Galapagos penguin (Spheniscus mendiculus) pair mating in the Galapagos Island Group, Ecuador

Heermann's Gull (Larus heermanni) eggs laid on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico

Northern fulmar (Fulmar glacialis) breeding pair on rocks Hebrides, Scotland

Adult Great Egret (Ardea alba) in courtship display near San Jose del Cabo, Baja California Sur, Mexico.

Heermann's Gull (Larus heermanni) mating ritual on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico

Adult puffin (Fratercula arctica) during breeding season on tiny Grimsey Island, Iceland

Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) from breeding colony on New Island in the Falkland Islands, South Atlantic Ocean

Adult waved albatross (Diomedea irrorata) courtship display at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador. Pacific Ocean

Adult Barrow's Goldeneye (Bucephala islandica) in full breeding plumage in the calm waters of Lake Myvatn, Iceland

Br�ï�¿�½�Ã�·nnich?s guillemot (Uria lomvia) breeding and nesting site at Cape Fanshaw in the Svalbard Archipelago, Barents Sea, Norway

Antarctic Shag (Phalacrocorax (atriceps) bransfieldensis) on breeding colony on Petermann Island on the west side of the Antarctic Peninsula

Elegant terns (Sterna elegans) nesting on tiny and remote Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico

Reflected sunlight on king penguin (Aptenodytes patagonicus) breeding and nesting colonies on South Georgia Island, Southern Ocean.

Flightless cormorant (Nannopterum harrisi) parent at sunset with chick in the Galapagos Island Group, Ecuador

Chinstrap penguin pair (Pygoscelis antarctica) mating at a breeding colony on Barrentos Island in the Aitcho Island Group in the South Shetland Islands near the Antarctic Peninsula

Adult Great Egret (Ardea alba) in courtship display near San Jose del Cabo, Baja California Sur, Mexico.

Adult Black-browed albatross (Thalassarche melanophrys) feeding and preening chick at breeding colony on New Island in the Falkland Islands, Southern Atlantic Ocean

Adult Heermann's gull (Larus heermanni) on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico

Adult Antarctic Shag, (Phalacrocorax (atriceps) bransfieldensis) from breeding colony on the Antarctic Peninsula

A pair of adult Barrow's Goldeneye (Bucephala islandica) in full breeding plumage in the calm waters of Red Bluff Bay, Southeastern Alaska, USA

Chinstrap penguin pair mating (Pygoscelis antarctica) at breeding colony on Bailey Head on Deception Island in the South Shetland Islands, Antarctica

Sally lightfoot crabs (Grapsus grapsus) mating in the litoral of the Galapagos Island Archipelago, Ecuador

Adult male and female common mergansers (Mergus merganser) in breeding plumage in Gambier Bay on Admiralty Island, Southeastern Alaska, USA

Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) from breeding colony on New Island in the Falkland Islands, South Atlantic Ocean

Adult Antarctic Shag, (Phalacrocorax (atriceps) bransfieldensis) from breeding colony on the Antarctic Peninsula

Blue-footed booby (Sula nebouxii) in ritualistic courtship display in the Galapagos Island Group, Ecuador. MORE INFO: The Galapagos are a nesting and breeding area for blue-footed boobies.