Roy Mangersnes / Black-legged kittiwakes (Rissa tridactyla) in flight during evening snowfall, Northern Nordaustlandet, Svalbard, Norway, August

Roy Mangersnes / Black-legged kittiwakes (Rissa tridactyla) on an old building including one landing, Finnmark, Norway, April

Orsolya Haarberg / Kittiwakes (Rissa tridactyla) nesting on the roof of an abandoned house, Rost, Lofoten, Nordland, Norway, June

Wild Wonders of Europe / de la Lez / Black legged kittiwakes (Rissa tridactyla) in flight over ice, Kungsfjord, Svalbard, Norway, June 2008 Wild Wonders kids book.

Andrew Parkinson / Two Kittiwakes (Rissa tridactyla) greeting one another after one returns to the nest site, Farne Islands, UK

Sue Flood / Kittiwakes (Rissa tridactyla) pair perched on rock on Tyuleniy Island in the Kuril Island chain, Russian Far East, June

David Tipling / Kittiwakes (Risa tridactyla) on nests on Tyne Bridge, Newcastle

Andrew Walmsley / Tourists and photographers next to nesting cliff on Inner Farne island, Northumberland, watching Kittiwakes (Rissa tridactyla), Razorbills (Alca torda) and European shag (Phalacrocorax aristotelis),...

Andrew Walmsley / Tourists and photographers next to nesting cliff on Inner Farne island, Northumberland, watching Kittiwakes (Rissa tridactyla), Razorbills (Alca torda) and European shags (Phalacrocorax aristotelis),...

Andrew Walmsley / General view of nesting cliff on Inner Farne island, Northumberland. European shag (Phalacrocorax aristotelis) in the foreground, Kittiwakes (Rissa tridactyla), Guillemots (Uria aalge) and Razorbills...

Andrew Walmsley / General view of nesting cliff on Inner Farne island, Northumberland. European shag (Phalacrocorax aristotelis) in the foreground, Kittiwakes (Rissa tridactyla), Guillemots (Uria aalge) and Razorbills...

Andrew Walmsley / General view of nesting cliff on Inner Farne island, Northumberland. European shag (Phalacrocorax aristotelis) in the foreground, Kittiwakes (Rissa tridactyla), Guillemots (Uria aalge) and Razorbills...

Staffan Widstrand / Kittiwakes (Rissa tridactyla) resting on a ice berg, Svalbard, Norway July

Staffan Widstrand / Kittiwakes (Rissa tridactyla) resting on a iceberg, Svalbard, Norway July

Erlend Haarberg / Black-legged kittiwakes (Rissa tridactyla) nesting in the windows of an abandoned house, Rost, Norway, July

Erlend Haarberg / Two Black-legged kittiwakes (Rissa tridactyla) Varanger, Finnmark, Norway, May

Erlend Haarberg / Two Black-legged kittiwakes (Rissa tridactyla) fighting in flight, Varanger, Finnmark, Norway, July

Erlend Haarberg / Two Black-legged kittiwakes (Rissa tridactyla) calling, one flapping wings, Varanger, Finnmark, Norway, May

Ben Hall / Kittiwakes (Rissa tridactyla) pair on nest touching beaks, Farne Islands, Northumberland, UK June

Roy Mangersnes / Black-legged kittiwakes (Rissa tridactyla) on breeding cliff, Finnmark, Norway, April

Paul Hobson / Two Kittiwakes (Rissa tridactyla) on ice. Svalbard, Norway June.

Andrew Parkinson / Kittiwakes (Rissa tridactyla) breeding pair mating on their cliff top nest site, Farne Islands, Northumberland, UK, May.

Andrew Parkinson / Kittiwakes (Rissa tridactyla) pair greeting one another on their nest site, Saltee Islands, Republic of Ireland, UK, May.

Bryan and Cherry Alexander / Tourists watching Kittiwakes (Rissa tridactyla) come and go from their nests on a cliff. Nelsonoya, Svalbard, Norway, June 2006.

Bryan and Cherry Alexander / Kittiwakes (Rissa tridactyla) nesting above a window in the coal mining town of Barentsburg. Spitsbergen, Norway, June 2006.

Bryan and Cherry Alexander / Kittiwakes (Rissa tridactyla) nesting on a window sill in the Russian coal mining town of Barentsburg, Spitsbergen, Norway, June 2006.

Brent Stephenson / Adult and chick Black-legged Kittiwakes (Rissa tridactyla) at their cliff based nest sites. Grundafjordur, Iceland, July.

Ann & Steve Toon / Kittiwakes (Rissa tridactyla) with chicks on nests on cliff face, Farne Islands, Northumberland, UK, June

Orsolya Haarberg / Kittiwakes (Rissa tridactyla) nesting in windows of an abandoned wooden house, Rost, Lofoten, Nordland, Norway, June

Orsolya Haarberg / Kittiwakes (Rissa tridactyla) perched on cliff ledge with frozen icicles, Moskenes, Lofoten, Nordland, Norway, March

Orsolya Haarberg / Kittiwakes (Rissa tridactyla) perched on cliff ledge with frozen icicles, Moskenes, Lofoten, Nordland, Norway, March

Orsolya Haarberg / Kittiwakes (Rissa tridactyla) chasing each other in flight, Hornoya, Vardo, Finnmark, Norway, July

Kevin Schafer / Kittiwakes (Rissa tridactyla) feeding in front of Monaco Glacier, Leifdefjorden, Svalbard, Norway 2010

Kevin Schafer / Travellers in zodiac boat amongst feeding Kittiwakes (Rissa tridactyla) in front of the Monaco Glacier, Leifdefjorden, Svalbard, Arctic Norway 2010

Philippe Clement / Black-legged kittiwakes (Rissa tridactyla) breeding on nests on ledges in sea cliff, Fowlsheugh RSPB reserve, NE Scotland, UK, May

Andrew Walmsley / Seabird colony on Craigleith Island with Kittiwakes (Rissa tridactyla) and Guillemots (Uria aalgae) Firth of Forth, Scotland, UK. June 2010

Eric Baccega / Brunnich's guillemots (Uria lomvia) and Black-legged kittiwakes (Rissa tridactyla) on cliff ledge, Hantzch Island, off Baffin Island Nunavut, Canada, August 2010

Steven Kazlowski / Flock of Black-legged kittiwakes (Rissa tridactyla) resting on ice floe in Hornsund, Burgerbukta, southern Svalbard archipelago, Norway

Chris Gomersall / Two Black-legged kittiwakes (Rissa tridactyla)nesting on building, by Scarborough's fish quay, Yorkshire, UK

Chris Gomersall / Black legged kittiwakes (Rissa tridactyla) at rest on an ice floe in Spitsbergen, Svalbard, Norway

Steven Kazlowski / Flock of Black legged kittiwakes (Rissa tridactyla) on water, Eastern coast of Svalbard, Norway

Wild Wonders of Europe / de la Lez / Black-legged kittiwakes (Rissa tridactyla) on sea ice by glacier, Smeerenburg fjord, Svalbard, Norway, July 2008

Laurie Campbell / Looking down on Kittiwakes (Rissa tridactyla) nesting on cliff ledges, St Abbs Head NNR, Berwickshire, Scotland, UK, June

David Tipling / Kittiwakes {Risa tidactyla} nesting on nest ledge on side of wooden building in Vado, Varanger, Finland, March

David Tipling / Kittiwakes {Rissa tridactyla} in blizzard, nesting on nest ledge on side of wooden building in Vado, Varanger, Finland, March 2006

Alan Williams / Seabird breeding cliffs on Staple Island, mainly Common guillemots (Uria aalge) Kittiwakes (Rissa tridactyla) and Shags (Phalacrocorax aristotelis) Farne Islands, UK, June 2005

Oriol Alamany / Red-legged kittiwakes (Rissa brevirostris) on rock, Saint George Island, Pribilof Islands, Alaska, USA

Oriol Alamany / Brunnich's guillemot / Thick billed murre (Uria lomvia) and Kittiwakes nesting on sea cliff, Saint George Island, Pribilof Islands, Alaska, USA

Oriol Alamany / Red-legged kittiwakes (Rissa brevirostris) nesting on cliff, Saint George Island, Pribilof Islands, Alaska, USA

Alan Williams / Kittiwakes (Rissa tridactyla) gathering nesting material from a farm field close to breeding cliffs, Fowlsheugh RSPB Reserve, Aberdeenshire, UK, May

Andrew Parkinson / Two Kittiwakes (Rissa tridactyla) bathing in a freshwater pool, Skomer Island, Wales, UK

Andrew Parkinson / Kittiwakes (Rissa tridactyla) and nests on a coastal cliff face, Farne Islands, UK

Andrew Parkinson / Two Kittiwakes (Rissa tridactyla) pair at nest site, Farne Islands, UK

Peter Lewis / Common guillemots (Uria aalge) and Kittiwakes (Rissa tridactyla) on Rock stacks, Farne Islands, Northumberland, UK

Peter Lewis / Common guillemots (Uria aalge) and Kittiwakes (Rissa tridactyla) on Rock stacks, Farne Islands, Northumberland, UK

Peter Lewis / Common guillemots (Uria aalge) and Kittiwakes (Rissa tridactyla) on Rock stacks, Farne Islands, Northumberland, UK

Dave Bevan / Kittiwakes (Rissa tridactyla) on nests on cliff ledges, Farne Is, UK, June

Sue Flood / Auks, kittiwakes and guillemots nesting on columnar basalt at Rubini Rock, off Hooker Island, Franz Josef Land, Russian Arctic

Paul Hobson / Kittiwakes (Rissa tridactyla) nesting colony on cliff, Dunbar Castle walls, Scotland, UK

Steve Knell / Kittiwakes {Rissa tridactyla} two fighting. UK, 2006

Roger Powell / Black-legged Kittiwakes (Rissa tridactyla) in flight and fighting, Northumberland, U.K.

Kerstin Hinze / Juvenile Northern Goshawk (Accipiter gentilis) with Kittiwake (Rissa tridactyla) prey, perched on cliff in kittiwake rookery, Ekkeroy Island, Varanger Peninsular, Norway

Sue Flood / Flock of Sooty shearwaters {Puffinus griseus} and Black legged kittiwakes feeding {Rissa tridactyla)

Sue Flood / Flock of Sooty shearwaters {Puffinus griseus} and Black legged kittiwakes feeding {Rissa tridactyla)

Steve Knell / Kittiwakes nesting on cliffs {Rissa tridactyla} Scotland, UK

DAVID TIPLING / Kittiwakes {Rissa tridactyla} nesting on the side of Tyne bridge, Newcastle City Centre, UK.

DAVID TIPLING / Kittiwakes {Rissa tridactyla} nesting on the side of building, Newcastle City Centre, UK.

Jose Schell / Kittiwakes nesting on cliff (Rissa tridactyla) Canada St Lawrence Gulf

Jose Schell / Kittiwakes nesting on cliff (Rissa tridactyla) Canada St Lawrence gulf

Tui De Roy / Brunnich's Guillemot (Uria lomvia) and Black-legged Kittiwakes (Rissa tridactyla) nesting on the South Coast Cliffs, Bear Island, Barents Sea, Norwegian Arctic

Doug Allan / Bird cliffs with nesting Kittiwakes and Guillemots Leopold Is, Canadian Arctic

Ben Osborne / Kittiwakes calling showing red mouth / tongue {Rissa tridactyla} Talan Is, Okhotsk

Ben Osborne / Kittiwakes mating at nest site {Rissa tridactyla} Talan Is, Okhotsk Sea, E Russia

Patricio Robles Gil / Kittiwake + chick at nest on cliff {Rissa tridactyla} Iceland

Patricio Robles Gil / Kittiwakes roosting on nest {Rissa tridactyla} Iceland

Patricio Robles Gil / Kittiwake pair at nest on cliff {Rissa tridactyla} Iceland

Solvin Zankl / Flock of flying Kittiwakes {Rissa tridactyla} Orkney, Scotland, UK

Mike Read / Kittiwake at nest with chicks {Rissa tridactyla} Ekkeroy, Norway

Ben Osborne / Steller's sea eagle (Haliaeetus pelagicus) hunting seabirds off cliffs of Talan Island, Okhotsk Sea, Russia

Ben Osborne / Kittiwake flying to nest with material {Rissa tridactyla} Talan Is, Okhotsk Sea, E Russia

Ben Osborne / Kittiwakes fly to collect mud for nest {Rissa tridactyla} Talan Is, Okhotsk Sea, E Russia

Ben Osborne / Kittiwake {Rissa tridactyla} and Common guillemot {Uria aalge} cliff nest colony, Talan Is, Russia

Tom Vezo / Kittiwakes nesting on cliff, Newfoundland, Canada

Mike Read / Kittiwake flying {Rissa tridactyla} Ekkeroy, Norway

Mike Read / Kittiwake in flight {Rissa tridactyla} Ekkeroy, Norway

Mike Read / Kittiwakes nesting on harbour building {Rissa tridactyla} Vardo, Norway

Asgeir Helgestad / Kittiwakes nesting {Rissa tridactyla} above window in fishing village, A in Lofoten, Noway

Doug Allan / Bird cliffs with nesting Kittiwakes and Guillemots Leopold Is, Canadian arctic

Onne van der Wal / Kittiwakes (Rissa tridactyla) nesting in precarious positions on a cliff in the Kenai Fjords National Park, Kenai Peninsula, Alaska.

Louis Gagnon / Kittiwakes (Rissa tridactyla) flying over sea beside nesting cliffs, Canada

Barry Bland / Kittiwakes (Rissa tridactyla) sitting on cliff edge nests, UK.

DAVID TIPLING / Red-legged kittiwakes on beach {Rissa brevirostris} Pribilof's Is, Bering sea, Alaska vulnerabl

Ben Osborne / Kittiwakes mating at nest site {Rissa tridactyla} Talan Is Okhotsk Sea E Russia

Ben Osborne / Kittiwake colony on cliffs {Rissa tridactyla} Talan Is Okhotsk Sea E Russia

Ben Osborne / Kittiwake {Rissa tridactyla} Common guillemot {Uria aalge} cliff colony Talan Is Russia

Ben Osborne / Steller's sea eagle (Haliaeetus pelagicus) hunting Kittiwakes along cliff, Talan Island, Okhotsk Sea, Eastern Russia.