Pal Hermansen / Brunnich's guillemot (Uria lomvia) taking off from water, Alkefjellet. Svalbard, Norway, July.

Nick Hawkins / Razorbill (Alca torda) and Common guillemots / murres (Uria aalge) on top of coastal rock, Machias Seal Island, Bay of Fundy, New Brunswick, Canada, May.

Nick Hawkins / Two Common guillemots / murres (Uria aalge) with fish prey, the right one a Bridled guillemot morph with a white ring around the eye, Machias Seal Island, Bay of Fundy, New Brunswick, Canada, July.

Pal Hermansen / Brunnich's guillemot (Uria lomvia) in flight, seen from below at Alkefjellet Bird Cliff, Svalbard, Norway, July.

Loic Poidevin / Guillemot (Uria aalge) flying, Hornoya, Varenger, Norway, April.

David Tipling / Common guillemots / Common murres (Uria aalge) with eggs, Inner Farne, Farne Islands, Northumberland, UK, May.

Markus Varesvuo / Brunnnich's guillemot (Uria aalge) in flight, Vardo, Norway, March.

Sue Flood / Brunnichs guillemots / thick billed murres (Uria lomvia)on sea surface, Brat Chirpoy islands, Kurils, Russian Far East, June

Gerrit Vyn / Aerial view of a raft of courting adult Guillemots / Common Murres (Uria aalge). Murres assemble in large, noisy rafts adjacent to cliffs prior to nesting. Duck Island, Alaska, USA

Gerrit Vyn / Raft of courting adult Guillemots / Common Murres (Uria aalge). Murres assemble in large, noisy rafts adjacent to cliffs prior to nesting. Duck Island, Alaska, USA

Gerrit Vyn / Raft of courting adult Guillemots / Common Murres (Uria aalge). Murres assemble in large, noisy rafts adjacent to cliffs prior to nesting. Duck Island, Alaska, USA

Doug Allan / Common murres / guillemots (Uria aalge) in flight, Lancaster Sound, Canadian Arctic