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

An adult Sabine's Gull (Xema sabini) in melt water pool in the Svalbard Archipelago, Norway, Arctic, Europe

Adult black-necked stilt (Himantopus mexicanus) wading and feeding in a brackish water lagoon on Floreana Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult male magnificent frigatebird (Fregata magnificens), San Gabriel Bay, Espiritu Santo Island, Baja California Sur, Mexico, North America

Black browed albatross snuggling in nest, Falkland Islands, South America

Adult black-legged kittiwakes (Rissa tridactyla) on ice near Alexander Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

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

Great Frigatebird male (Fregata minori), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult black-browed albatross (Thalassarche melanophrys), in flight returning to nesting site on West Point Island, Falklands, South America

Adult black-browed albatross (Thalassarche melanophrys), close up of tail at nesting site on New Island, Falklands, South America

Great Kiskadee, (Pitangus Sulphuratus), a passerine bird common in Central and South America, Bermuda, Atlantic, North America

Heermann's gull (Larus heermanni), at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica

Adult black-browed albatross (Thalassarche melanophrys), close up at nesting site on West Point Island, Falklands, South America

Adult elegant tern (Thalasseus elegans), looking for fish on Isla Carmen, Baja California Sur, Sea of Cortez, Mexico, North America

Australasian darter bird (Anhinga novaehollandiae) drying wings, snake bird spreading wings, Poovar Island, Kerala, India, Asia

World's largest colony of Frigate Birds (Fregata magnificens) in the lagoon, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

Great Frigatebird male (Fregata minori), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Black-headed gull Chroicocephalus ridibundus), summer plumage, hovering over flowering cotton grass, Finland, Europe

Black-faced sandgrouse (Pterocles decoratus), male, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa

Black-headed gull (Chroicocephalus ridibundus) in winter plumage in this popular coastal town, Aberaeron, Ceredigion, Wales, United Kingdom, Europe

World's largest colony of Frigate Birds (Fregata magnificens) in the lagoon, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

A male pin-tailed whydah (Vidua macroura), in breeding plumage in Tarangire National Park, Tanzania, East Africa, Africa

The proud look of a black woodpecker with its sharp peak and its red crown, Lombardy, Italy, Europe

Indian Black Kite raptor bird, Milvus Migrans, in the sky above Lake Pichola in first light of early morning, Udaipur, Rajasthan, India

Black swan, Cygnus atratus, with red beak in North Norfolk, UK

Indian Black Kite raptor bird, Milvus Migrans, in the sky above Lake Pichola in first light of early morning, Udaipur, Rajasthan, India

Black-necked stork, Queensland, Australia

Black-Headed Ibis, Threskiornis melanocephalus, feeding in Ranthambhore National Park, Rajasthan, Northern India

Black-necked stork, Queensland, Australia

Black-Headed Ibis, Threskiornis melanocephalus, feeding in Ranthambhore National Park, Rajasthan, Northern India

Black-winged Lapwing, Ngorongoro, Tanzania, East Africa

Black-Headed Ibis, Threskiornis melanocephalus, pair feeding in Ranthambhore National Park, Rajasthan, Northern India

Black-Headed Ibis, Threskiornis melanocephalus, in Ranthambhore National Park, Rajasthan, Northern India

Black-headed gull (Larus ridibundus) in winter plumage calling from tree branch, St. James's Park, London, England, United Kingdom, Europe

Black Drongo, Dicrurus macrocercus, bird in Ranthambhore National Park, Rajasthan, Northern India

A Black Browed Albatross; Thalassarche melanophrys, flying in the Drake Passage, Sub-Antarctica.

A Guillemot (Uria aalge) covered in oil on a black sand volcanic beach at Vik, on Iceland's south coast, Iceland, Polar Regions

A pair of Black guillemots bonding in Oban, Scotland, United Kingdom, Europe

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.

Black Headed Gull (Larus ridibundas) and Herring Gull (Larus argentatus) juvenile taking off from pond with winter plumage . Maryhill Canal, Strathclyde, Scotland, UK

capercaillie, tetrao urogallus male defending territory, deeside, scotland

A Guillemot (Uria aalge) covered in oil on a black sand volcanic beach at Vik, on Iceland's south coast, Iceland, Polar Regions

Adult black guillemot (Cepphus grylle) taking flight in the Svalbard Archipelago in the Barents Sea, Norway

Adult black guillemot (Cepphus grylle) taking flight with fish in the Svalbard Archipelago in the Barents Sea, Norway

Adult black guillemot (Cepphus grylle) in summer plumage in the Svalbard Archipelago in the Barents Sea, Norway.

Black Headed Gull (Larus ridibundas) taking off from pond with winter plumage . Maryhill Canal, Strathclyde, Scotland, UK

A Guillemot (Uria aalge) covered in oil on a black sand volcanic beach at Vik, on Iceland's south coast, Iceland, Polar Regions

Adult black guillemot (Cepphus grylle) in summer plumage in the Svalbard Archipelago in the Barents Sea, Norway.

Adult black guillemot (Cepphus grylle) in summer plumage near Vigur Island in Isafjardardjup Bay, Iceland

Adult black guillemot (Cepphus grylle) in summer plumage near Vigur Island in Isafjardardjup Bay, Iceland

Siskins (Carduelis spinus) feeding on a garden feeder in Ambleside, Cumbria, England, United Kingdom, Europe

Black Headed Gull (Larus ridibundas) taking off from pond with winter plumage . Maryhill Canal, Strathclyde, Scotland, UK

Black-Headed Gull (larus ridibundus) taking off from ice on a frozen pond in Glasgow city centre . Glasgow, Hyndland Park, Argyll, Scotland, UK

Black-Headed Gull (larus ridibundus) taking of from a city pond in winter, female tufted duck in fore ground. Glasgow, Hyndland Park, Argyll, Scotland, UK

Eurasian coot on ice at Martin Mere bird reserve near Ormskirk, Lancashire, England, United Kingdom, Europe

Black and white swans in the Bussaco Forest reserve in Portugal, Europe

Black-Headed Gull (larus ridibundus) taking off from ice on a frozen pond in Glasgow city centre . Glasgow, Hyndland Park, Argyll, Scotland, UK

Black-Headed Gull (larus ridibundus) taking of from ice on a frozen pond in Glasgow city centre front on view. Glasgow, Hyndland Park, Argyll, Scotland, UK

A Black Headed Gull (Larus ridibundus) in breeding plumage, Moray Firth, Scotland.

Adult black guillemot (Cepphus grylle) in summer plumage in the Svalbard Archipelago in the Barents Sea, Norway.

Black-Headed Gull (larus ridibundus) flying over a city pond in winter. Glasgow, Hyndland Park, Argyll, Scotland, UK

Black-Headed Gull (larus ridibundus) taking of from ice on a frozen pond in Glasgow city centre front on view. Glasgow, Hyndland Park, Argyll, Scotland, UK

Adult black guillemot (Cepphus grylle) in summer plumage on ice in the Svalbard Archipelago in the Barents Sea, Norway.

Black-Headed Gull (larus ridibundus) taking off from ice on a frozen pond in Glasgow city centre . Glasgow, Hyndland Park, Argyll, Scotland, UK

Adult black guillemot (Cepphus grylle) in summer plumage in the Svalbard Archipelago in the Barents Sea, Norway.

Drake Wood Duck

Drake Wood Duck

Bald Eagle (Haliaeetus leucocephalus, at Hellenthal Zoo, Hellenthal, North Rhine-Westphalia, Germany, Europe

black and white portrait of a Golden Eagle Aquila chrysaetos

Black-bellied Plover (Pluvialis squatarola), adult at beach in breeding plumage, Bolivar Flats, Texas Coast, USA

Black-tailed Godwit (Limosa limosa), adult walking in water with reflection in breeding plumage, National Park Lake Neusiedl, Burgenland, Austria, Europe

Black-tailed Godwit (Limosa limosa), adult wings up in breeding plumage, National Park Lake Neusiedl, Burgenland, Austria, Europe

Close-up of King Penguin's (Aptenodytes patagonicus) head looking up, showing detail of coloured plumage, Volunteer Point, Falkland Islands

Close-Up Of Chilean Flamingo (Phoenicopterus Chilensis) Head Against A Black Background, Iguazu Falls, Parana, Brazil

Toco Toucan (Ramphastos Toco) On Branch Looking At Camera, Mato Grosso Do Sul, Brazil

Female Von der Decken's hornbill (Tockus deckeni) on thornbush, Serengeti, Tanzania

Male common ostrich (Struthio camelus) crosses savannah in profile; Otavi, Otjozondjupa, Namibia

Portrait of a southern yellow-billed hornbill (Tockus leucomelas) perching in profile on a bush. It has mottled black and brown feathers, a white head and a yellow beak, taken at the Gabus Game Ranch; Otavi, Otjozondjupa, Namibia

Close Up Of The Head And Beak Of A Bald Eagle (Haliaeetus Leucocephalus), Unalaska, Alaska, United States Of America

A black-billed magpie (Pica hudsonia) picks the bones of a dead Dall sheep killed by wolves in Chugach State Park, Alaska, United States of America

Snowy owl (Bubo scandiacus) in flight; Quebec, Canada

Male zebra finch (Taeniopygia guttata) on branch in profile; Otavi, Otjozondjupa, Namibia

Close-up portrait of an oystercatcher bird (Haematopus) standing on a rock covered in yellow, orange colored seaweed, on a summer day in Prince William Sound, Alaska, United States of America

Close-up of male common ostrich (Struthio camelus) in profile in Serengeti National Park, Tanzania

Secretary bird (Sagittarius serpentarius) spreads wings above tawny eagle (Aquila rapax) in Serengeti National Park, Tanzania

Secretary bird (Sagittarius serpentarius) and tawny eagle (Aquila rapax) with kill in Serengeti National Park, Tanzania

Green-Billed Toucan (Ramphastos Dicolorus) Perched On Branch In Forest, Parana, Brazil

Bateleur (Terathopius ecaudatus) under blue sky on dead tree in Serengeti National Park, Tanzania

Portrait of a male, common ostrich (Struthio camelus) lowering head and walking through the long grass at the Gabus Game Ranch; Otavi, Otjozondjupa, Namibia

A rather annoyed looking male Pileated woodpecker (Dryocopus pileatus) clings to the top of a locust tree post, Weaverville, North Carolina, United States of America

Hairy woodpecker (Leuconotopicus villosus) feeding it's young at the nest hole, La Mauricie National Park; Quebec, Canada

Portrait of a bald eagle (Haliaeetus leucocephalus), Denver, Colorado, United States of America

Pileated woodpecker (Dryocopus pileatus) feeding it's young at the nest hole, La Mauricie National Park; Quebec, Canada

Bald eagle (Haliaeetus leucocephalus) with splashes of water; Denver, Colorado, United States of America

White-backed vulture (Gyps africanus) on dead tree stump, Tarangire National Park, Tanzania

Black-necked stilt (Himantopus mexicanus) with reflection in water, Bences Hide, Pusztaszer, Hungary

Black-chested snake-eagle l(Circaetus pectoralis) looking down from leafy treetop, Serengeti, Tanzania

Black-shouldered kite (Elanus caeruleus) facing right in bare branches, Serengeti, Tanzania

Black-Bellied Plover (Pluvialis Squatarola) In Winter Plumage Reflected In Tide Pool Along Shoreline, Florida, Usa

Marabou stork (Leptoptilos crumenifer) stands on rock turning head, Serengeti, Tanzania