Frederique Olivier / Snow petrels (Pagodroma nivea) squabbling and interacting, Antarctica.

Frederique Olivier / Snow petrel (Pagodroma nivea) looking around, vocalising, Antarctica.

Pal Hermansen / Fulmar (Fulmarus glacialis) in flight, Iceland, July

Pal Hermansen / Fulmar (Fulmarus glacialis) over calm sea, Iceland, July.

Eric Medard / Manx shearwater (Puffinus puffinus) taken with infrared light at night, Wales, UK.

Will Burrard-Lucas / Northern fulmar (Fulmarus glacialis),flying across waterfall. Skogafoss waterfall in Iceland. July 2015.

Doug Perrine / Laysan albatrosses (Phoebastria immutabilis) chicks on nests around an old gun battery part of WWII defences. Eastern Island, Midway Atoll. March 2010.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans) with water dripping from beak, Kaikoura, New Zealand, March.

Luis Quinta / Balearic shearwater (Puffinus mauretanicus) dead in water due to fatigue from migration. Portugal