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

Hanne & Jens Eriksen / Black guillemot (Cepphus grylle) taking off, Denmark, May

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

Wild Wonders of Europe / Liodden / Black guillemot (Cepphus grylle) in flight over water, Spitsbergen, Svalbard, March 2009

Wild Wonders of Europe / Liodden / Black guillemot (Cepphus grylle) diving into water, Spitsbergen, Svalbard, March 2009

Roger Powell / Black Guillemot {Cepphus grylle} with Sandeel fish in beak trying to entice a female to his nest site, Caithness, Scotland, UK

Andrew Parkinson / Black guillemot (Cepphus grylle) with a fish in its beak, evening light, Shetland Islands, Scotland, UK, July

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...

Andy Rouse / Black guillemot (Cepphus grylle) at sunset on water, Svalbard, Norway, July.

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 / 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.