Terry Whittaker / Man collecting seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being raised up cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man sorting seabird eggs, including those of Common guillemots (Uria aalge) into egg boxes, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Pal Hermansen / Avalanche on Gullemot (Uria aalge) nesting cliff on first day birds return to breed. Finnmark, Norway. March.

Philippe Clement / Common guillemots (Uria aalge) and Razorbills (Alca torda) swimming and fishing at sea, Fowlsheugh RSPB Reserve, Aberdeenshire, Scotland, UK, May.

Erlend Haarberg / European shag (Phalacrocorax aristotelis) sitting at the entrance of a cave with flock of Common guillemots (Uria aalge) and Gulls (Laridae) flying past cave, Hornoya and Reinoya Nature Reserve, Finnm...

Espen Bergersen / Gyrfalcon (Falco rusticolus) flying with guillemot prey. Hornoya bird cliff. Finnmark, Norway. March

Espen Bergersen / Common guillemot (Uria aalge) flock, circling outside the breeding colony at Hornoya birdcliff, Finnmark, Norway.

Espen Bergersen / Common guillemot (Uria aalge) calling, bridled guillemot morph with white ring around the eye, Hornoya bird cliff, Finnmark, Norway. March.

Markus Varesvuo / Two Guillemots (Uria aalge) on cliff top, Norway, July

Markus Varesvuo / Guillemot (Uria aalge) flock in flight over nesting colony on rocks, Norway, July 2008

Markus Varesvuo / Guillemot (Uria aalge) in flight over water, Norway, July

Markus Varesvuo / Guillemot (Uria aalge) landing in colony, Norway, July

Markus Varesvuo / Guillemot (Uria aalge) in flight, Norway, July

Markus Varesvuo / Guillemot (Uria aalge) in flight, Norway, July

Markus Varesvuo / Guillemots (Uria aalge) in flight in snow, Vardo, Norway, March. Winner of 2nd Prize in the Nature (Single images) category of the World Press Photo Competition 2014.

Alex Mustard / 2020VISION / Common guillemot (Uria aalge) swimming underwater, Farne Islands, Northumberland, UK, July

Alex Mustard / 2020VISION / Common guillemot (Uria aalge) swimming underwater, Farne Islands, Northumberland, UK, July. Did you know? Guillemots are shaped like a penguin for hydrodynamics, but with wings like cormorants for aer...

Andrew Parkinson / Common Guillemot (Uria aalge) two adults perched together, Saltee Islands, Republic of Ireland, UK, May.

Wild Wonders of Europe / de la Lez / Arctic fox (Alopex lagopus) with Common guillemot (Uria aalge) prey, Alkehornet, Svalbard, Norway, July 2008

Laurie Campbell / Guillemot (Uria aalge) calling, Farne Islands, Northumberland, England, June

Wild Wonders of Europe / Hermansen / Common guillemot (Uria aalge) Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Common guillemot (Uria aalge) with fish in beak, Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Common guillemot (Uria aalge) bridled form and an out of focus Razorbill (Alca torda) Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Two Razorbills (Alca torda) and a Common guillemot (Uria aalge) Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Guillemots (Uria aalge) one in flight, two sitting on rock, Saltee Islands, County Wexford, Republic of Ireland, June 2009

Orsolya Haarberg / Common guillemot (Uria aalge) and razorbills (Alca torda). Langanes peninsula, Iceland. May 2008

Doug Allan / Common guillemots diving underwater, Canadian arctic, Lancaster Sound

Bernard Castelein / Common guillemot with fish {Uria aalge} Farne Is, UK Northumberland

Doug Allan / Common guillemots diving underwater (Uria aalge) Lancaster Sound, Canadian arctic

Terry Whittaker / Man being lowered down cliff to collect seabird eggs including those of Common murre/ guillemot (Uria aalge) and Black-legged kittiwake (Rissa tridactyla). Gannet (Morus bassanus) colony on opposite c...

Loic Poidevin / Common mure / guillemot (Uria aalge) group swimming on Barents sea. Horborgna Island, Varanger, Norway. May.

Terry Whittaker / Common murre / guillemot (Uria aalge) breeding colony on cliff edge. Langanes Peninsula, northeast Iceland. May.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs including those of Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) four in breeding colony, eggs exposed on rock surface. Langanes Peninsula, northeast Iceland. May.

Terry Whittaker / Man collecting seabird eggs including those of Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man collecting Common murre / guillemot (Uria aalge) eggs. Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man collecting seabird eggs including Common murre / guillemot (Uria aalge) from cliff. Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man collecting Common murre / guillemot (Uria aalge) eggs from cliff. Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man being lowered down steep cliff face to collect seabird eggs, including those of Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man eating boiled Common murre / guillemot (Uria aalge) egg, portrait. Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) and Fulmar (Fulmarus glacialis) eggs foraged from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs including those of Black-legged kittiwake (Rissa tridactyla) and Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula,...

Terry Whittaker / Man being lowered over cliff edge to collect seabird eggs. Pile of eggs on cliff top including those of Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May...

Terry Whittaker / Two men on cliff top with Common guillemot / murre (Uria aalge) eggs collected from cliff face. Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) and Black-legged kittiwake (Rissa tridactyla) eggs in box and egg boxes. Collected from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge), Black-legged kittiwake (Rissa tridactyla) and Gull (Larus sp) eggs for sale at Reykjavik Weekend Market, Iceland. 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge), Black-legged kittiwake (Rissa tridactyla) and Gull (Larus sp) eggs for sale at Reykjavik Weekend Market, Iceland. 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge), Black-legged kittiwake (Rissa tridactyla) and Gull (Larus sp) eggs for sale at Reykjavik Weekend Market, Iceland. 2018.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs including those of Common murre / guillemot (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) breeding colony. Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May.

Terry Whittaker / Two men washing Common murre / guillemot (Uria aalge) eggs in stream. Collected from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Seabird eggs including those of Common murre/ guillemot (Uria aalge) in fridge. Collected from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) egg collected from Skoruvikurbjarg cliffs, candled over light. Iceland. May 2018

Terry Whittaker / Washing Common murre / guillemot (Uria aalge) eggs in sink before sale. Foraged from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Washing Common murre / guillemot (Uria aalge) eggs in sink before sale. Foraged from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Terry Whittaker / Common murre / guillemot (Uria aalge) eggs in box. Foraged from Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland. May 2018.

Theo Bosboom / Scientists with stranded Guillemot (Uria aalge), taking a blood sample to investigate the health of the bird and to control if it is ready to be released, Texel, the Netherlands. February 2019.

Theo Bosboom / Dead guillemot washed up at the beach of Texel in the Netherlands. An estimated number of 20.000 guillemots died in January/February 2019 in the Netherlands. The cause is being investigated by scienti...

Theo Bosboom / Dead guillemots that have washed up along the Dutch North sea coast in January / February 2019 prepared for an investigation by researchers at the Universities of Utrecht and Wageningen.Netherlands. F...

Theo Bosboom / Dead guillemot is photographed before it is investigated by researchers. A number of dead guillemots t washed up along the Dutch North sea coast in January / February 2019

Theo Bosboom / Rough weather in the North sea, possibly the cause of death of guillemots. 20,000 died off the Netherlands in February 2019.

Theo Bosboom / Rescue worker of releasing a Guillemot (Uria aalge) on the coast of Texel, The Netherlands, February 2019.

Theo Bosboom / A dead guillemot washed up at the beach of Texel in the Netherlands. An estimated number of 20.000 guillemots died in January/February 2019 in the Netherlands. The cause is being investigated by scien...

Theo Bosboom / Dead guillemots that have washed up along the Dutch North sea coast in January / February 2019 prepared for an investigation by researchers at the Universities of Utrecht and Wageningen.Netherlands. F...

Theo Bosboom / Dead guillemots that have washed up along the Dutch North sea coast in January / February 2019 prepared for an investigation by researchers at the Universities of Utrecht and Wageningen.Netherlands. F...

Theo Bosboom / Dead guillemots washed up along the Dutch North sea coast in January / February 2019 prepared for investigation by researchers at the Universities of Utrecht and Wageningen.Netherlands. February 2019.

Theo Bosboom / Plastic balloon found washed up on the beach of Texel, the Netherlands

Theo Bosboom / Stranded guillemots (Uria aalgae) in care at Ecomare, Texel. This guillemot is doing a test swim, to see if it healthy enough to stay afloat. The Netherlands, February 2019.

Theo Bosboom / Guillemot (Uria aalge) in care after they were stranded, Ecomare, Texel, the Netherlands.February 2019,

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Men sorting seabird eggs, including those of Common guillemots (Uria aalge) into egg boxes, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Box of harvested seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man gathering harvested seabird eggs, including those of Common guillemots (Uria aalge) into a box, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man collecting seabird eggs, including those of Common guillemots (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man collecting seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being raised up a cliff after collecting seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Common murre or common guillemot (Uria aalge). Langanes peninsula, northeast Iceland. May.

Terry Whittaker / Common murre / guillemots (Uria aalge) in nest colony on Langanes peninsula, northeast Iceland. May.

Terry Whittaker / Guillemots (Uria aalge) nesting on sea stack. Hornvik, Hornstrandir, Iceland. July 2015

SCOTLAND: The Big Picture / Replica Great auk (Pinguiunis impennis) egg next to guillemot (Uria aalge), at location of probable historic great auk breeding site, Shiant Isles, Outer Hebrides, UK. June.

Pal Hermansen / Guillemot (Uria aalge) breeding colony on cliff in snow. Finnmark, Norway. March.

Chris Gomersall / Sea cliffs on the Shiant Isles, with nesting ledges of Common guillemots (Uria aalge). The Minch, Outer Hebrides, Scotland. July 2016.

Werner Bollmann / Guillemots (Uria aalge) flock in flight, Hornoya, Norway.

Werner Bollmann / Guillemots (Uria aalge) group in mist, Hornoya, Norway.

Werner Bollmann / Guillemots (Uria aalge) colony, Hornoya, Norway. March 2013.

Ashley Cooper / Guillemot (Uria aalge) covered in oil on a black sand volcanic beach at Vik, on Iceland. September 2010.

Ashley Cooper / Guillemot (Uria aalge) covered in oil on a black sand volcanic beach at Vik, on Iceland. September 2010.