Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) attacking an Arctic Fox (Vulpes / Alopex lagopus) protecting its nest site, Spitsbergen, Svalbard, Norway. Highly commended, MAMMALS, GDT 2011 competition

Marie Read / Arctic terns (Sterna paradisaea), two in flight over nesting colony in field of buttercups (Ranunculus sp.), Keflavik, Iceland. Digital canvas expansion.

George Sanker / Arctic tern (Sterna paradisaea), two fighting in mid-air. Machias Seal Island, New Brunswick / Maine, Canada / USA. July.

Ann & Steve Toon / Arctic tern (Sterna paradisaea) with sandeel. Inner Farne, Northumberland, UK. July.

Sven Zacek / Arctic tern (Sterna paradisea) sitting on its nest surrounded by various coastal colors. Harjumaa, Estonia. June.

Ole Jorgen Liodden / Arctic tern (Sterna Paradisaea) flying, Svalbard, Norway, July.

Theo Bosboom,Theo Bosboom / Arctic tern (Sterna paradisae) on telegraph lines, near a small village on the Reykjanes peninsula in the south west of Iceland, June

Paul Hobson / Arctic tern (Sterna paradisaea) two fighting in the air, Scotland, UK July

Andrew Walmsley / Arctic terns (Sterna paradisaea), adults defending their nests from photographers, Northumberland, June. No release available.

Markus Varesvuo / Arctic Tern (Sterna paradisaea) in flight, silhouetted against the moon at dusk, Uto Finland July

Peter Cairns / 2020VISION / Arctic Tern (Sterna paradisaea) in flight. Shetland, Scotland, August.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) in flight at twilight using slow shutter speed to accentuate blur and motion in low-key light, Inner Farne, Farne Islands, Northumberland, July.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) in flight, Inner Farne, Farne Islands, Northumberland, June.

David Tipling / 2020VISION / Arctic Tern (Sterna paradisaea) with sand eel in beak. Farne Islands, Northumberland, July.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) on rocks with tourists in the background, Inner Farne, Farne Islands, Northumberland, England, UK. 2020VISION Book Plate.

Erlend Haarberg / Two Arctic terns (Sterna paradisaea) in flight fighting, Iceland, August

Peter Cairns / 2020VISION / Arctic Tern (Sterna paradisaea) against white sky, Farne Islands, Northumberland, England, UK, July

Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) in flight, Svalbard, Norway, July. Highly commended, BIRDS category, GDT 2011 competition

Andrew Parkinson / Arctic tern (Sterna paradisaea) adult hovering directly in front of the sun, defending nest from perceived threat, Farne Islands, UK. June

Roger Powell / Arctic Tern (Sterna paradisaea) preening tail feathers, Varanger Fjord, Arctic Norway. June

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) in flight, stealing fish from Arctic Tern (Sterna paradisaea). Shetland Islands, Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Tern (Sterna paradisaea) in flight chasing Arctic Skua (Stercorarius parasiticus) that has stolen its food. Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) pair stealing fish from Arctic Tern (Sterna paradisaea) Shetland Islands, Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) pair stealing fish from Arctic Tern (Sterna paradisaea) in flight, Shetland Islands, Scotland, UK, July. (non-ex)

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) pair almost colliding in flight, as they pursue an Arctic Tern (Sterna paradisaea). Shetland Islands, Scotland, UK, July. (non-ex)

Edwin Giesbers / Arctic tern (Sterna paradisaea) in flight, vocalising, aggresive behaviour, Farne Islands, Northumberland, UK, June

Edwin Giesbers / Arctic tern (Sterna paradisaea) Farne Islands, Northumberland, UK, June

Edwin Giesbers / Arctic tern (Sterna paradisaea) in flight, calling, Farne Islands, Northumberland, UK, June

Edwin Giesbers / Arctic tern (Sterna paradisaea) in flight, Farne Islands, Northumberland, UK, June

Nick Garbutt / Arctic tern (Sterna Paradisaea) hovering in flight over an iceberg.Peterman Island, Antarctic Peninsula, Antarctica. February.

David Woodfall / Flock of Arctic terns (Sterna paradisaea) in flight, Long Nanny reserve, Northumberland, UK

David Woodfall / Arctic terns (Sterna paradisaea) in flight with a researcher walking, in mist, Northumberland, UK, June 2009

Andy Rouse / Arctic Tern (Sterna paradisaea) flying past an iceberg, Svalbard, Norway

Guy Edwardes / Arctic Tern (Sterna paradisaea) in flight over nesting colony, Isle of May, Firth of Forth, Fife, Scotland

Graham Eaton / Arctic Tern (Sterna paradisaea) fishing for sandeel, Anglesey, Wales, UK, July

Wild Wonders of Europe / Liodden / Arctic tern (Sterna paradisaea) in flight over water, Spitsbergen, Svalbard, Norway, June 2009

Inaki Relanzon / Arctic Tern (Sterna paradisaea) in flight, West coast of Iceland, July 2008

Markus Varesvuo / Arctic Tern (Sterna paradisaea) hovering in flight, June, Iceland. Magic Moments book plate.

Orsolya Haarberg / Arctic tern (Sterna paradisaea), adult feeding young. Jokulsarlon glacial lagoon. Iceland. August 2008

Steven Kazlowski / Polar bear (Ursus maritimus) climbing onto an iceberg with Arctic terns {Sterna paradisaea} flying overhead, Beaufort Sea, Arctic Ocean, Alaska

Andrew Parkinson / Arctic tern (Sterna paradisaea) adult aggressively defending its nest from a perceived threat, Farne Islands, UK

Tom Vezo / Arctic tern {Sterna paradisaea} stretching wings, USA.

Bruno de Faveri / Arctic Tern (Sterna paradisaea) with begging chick, Farne Islands, England, United Kingdom

Michael Quinton / Arctic Tern (Sterna paradisaea) flying, Alaska

Mitsuaki Iwago / Arctic Tern (Sterna paradisaea) flying overhead, Arctic

Espen Bergersen / Arctic terns (Sterna paradisaea) figting above the Reynisdrangar rock formation, Iceland

Jussi Murtosaari / Arctic tern (Sterna paradisaea) adult taking off from post, Finland, May.

Jussi Murtosaari / Arctic tern (Sterna paradisaea), on post, Finland, May.