Ismaele Tortella / Black-legged kittiwake (Rissa tridactyla) nesting above a window, Lofoten, Norway, August.

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adult perched on the side of the Tyne Bridge, overlooking Newcastle and the Tyne. Newcastle, UK. July

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adults and chicks on nests on the Tyne Bridge. Newcastle, UK. July.

Cyril Ruoso / Atlantic puffin (Fratercula arctica) seen from burrow, Iceland. July.

Pal Hermansen / Kittiwake (Rissa tridactyla) breeding on house wall, Norway, March.

Staffan Widstrand / Kittiwakes (Rissa tridactyla) nesting on wall of house, Vardo town, Varanger Peninsula, Norway, March.

Espen Bergersen / Kittiwakes (Rissa tridactyla) squabbling on ice. Svalbard, Norway. July

Erlend Haarberg / Black-legged kittiwakes (Rissa tridactyla) fighting mid air, Hornoeya. Finnmark, Norway, July.

Markus Varesvuo / Kittiwake (Rissa tridactylus) vocalising, Vardo, Norway, March.

Markus Varesvuo / Large flock of Kittiwakes (Rissa tridactyla) flying over the sea, Vardo, Norway, March.

Mike Read / Black-legged kittiwake (Rissa tridactyla) group in flight from the 'Angus' tour boat to the Treshnish Isles, Scotland, May.

Staffan Widstrand / Kittiwake colony (Rissa tridactyla) on cliffs, Syltefjordstauran, Varanger peninsula, Arctic Norway