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

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.

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

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

Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) in flight, Svalbard, Norway, July. Highly commended, BIRDS category, GDT 2011 competition. Joint runner up in Creative Visions of Nature Category, Wildlife Photographer...

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)

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

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

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

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

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

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

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

Richard Steel / 2020VISION / Arctic tern (Sterna paradisaea) in flight with sandeel in its beak, Farne Islands, Northumberland, England, UK, July.

Peter Cairns / 2020VISION / Two Arctic terns (Sterna paradisaea) interacting in flight, Shetland Isles, Scotland, UK, June.

Paul Hobson / Arctic Tern (Sterna paradisaea) chick calling portrait, Farne , Northumberland, UK July

Andrew Walmsley / Arctic tern (Sterna paradisaea), Inner Farne islands, Northumberland, June

Andrew Walmsley / Arctic tern (Sterna paradisaea), adult defending its nest, Inner Farne islands, Northumberland, June

Andrew Walmsley / Arctic tern (Sterna paradisaea), adult defending its nest, Inner Farne islands, Northumberland, June

Andrew Walmsley / Arctic tern (Sterna paradisaea), Inner Farne islands, Northumberland, June

Andrew Walmsley / Arctic tern (Sterna paradisaea), Inner Farne islands, Northumberland, June

Markus Varesvuo / Arctic Tern (Sterna paradisaea) with freshly caught fish, Uto Finland May

Markus Varesvuo / Arctic Tern (Sterna paradisaea) pair mating on beach, Uto Finland May

Markus Varesvuo / Arctic Tern (Sterna paradisaea) pair mating on beach, Uto Finland May

Markus Varesvuo / Arctic Tern (Sterna paradisaea) in flight, Uto Finland July

Markus Varesvuo / Arctic Tern (Sterna paradisaea) in flight, Uto Finland June

Mark Carwardine / Arctic tern (Sterna paradisaea) flying, Igloolik, Foxe Basin, Nunavut, Arctic Canada

Mark Carwardine / Arctic tern (Sterna paradisaea) flying, Igloolik, Foxe Basin, Nunavut, Arctic Canada

Mark Carwardine / Arctic tern (Sterna paradisaea) flying, Igloolik, Foxe Basin, Nunavut, Arctic Canada

Peter Cairns / Arctic Tern (Sterna paradisaea) in flight, silhouetted at dusk, Svalbard, Norway, August

Erlend Haarberg / Arctic tern (Sterna paradisaea) feeding young whilst hovering, Iceland August

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

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

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

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

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) in flight flashed against white sky to accentuate high-key light of white-on-white, Inner Farne, Farne Islands, Northumberland, July 2011.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) in flight flashed against white sky to accentuate high-key light of white-on-white, Inner Farne, Farne Islands, Northumberland, July 2011.

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. Did you know? Arctic te...

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) on wall silhouetted with fish in beak at sunset, Inner Farne, Farne Islands, Northumberland, July.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) silhouetted and landing on fence post at sunrise, with outer Farne Island group in background, Inner Farne, Farne Islands, Northumberland, June.

Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) catching fish with head partly submerged in water, Inner Farne, Farne Islands, Northumberland, June.

David Tipling / 2020VISION / Detail of Arctic Tern (Sterna paradisaea) primary feathers. Farne Islands, Northumberland, July.

Erlend Haarberg / Arctic terns (Sterna paradisaea) chasing Great Skua (Catharacta / Stercorarius skua) in flight, Iceland, August

Erlend Haarberg / Arctic tern (Sterna paradisaea) in flight, Iceland, June

Markus Varesvuo / Two Arctic tern (Sterna paradisaea) one with small fish in beak, Uto Finland, May

Markus Varesvuo / Two Arctic terns (Sterna paradisaea) on rock, Porvoo, Finland, May

Markus Varesvuo / Arctic tern (Sterna paradisaea) in flight, Uto, Finland, July

Ben Hall / Arctic tern (Sterna paradisaea) in flight at dawn, UK

Ben Hall / Arctic tern (Sterna paradisae) in flight at dawn, UK

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

Hanne & Jens Eriksen / Two Arctic terns (Sterna paradisaea) one flying towards the other perched on post, Iceland, June

Hanne & Jens Eriksen / Arctic tern (Sterna paradisaea) calling from pole, Iceland, June

Hanne & Jens Eriksen / Arctic tern (Sterna paradisaea) in flight, Iceland, June

Hanne & Jens Eriksen / Arctic tern (Sterna paradisaea) calling from pole, Iceland, June

Alan Williams / Arctic Tern (Sterna paradisaea) in flight carrying fish in beak, Cemlyn Bay, Anglesey, North Wales, UK, July

Alan Williams / Arctic Tern (Sterna paradisaea) recently fledged young resting on beach, Cemlyn Bay, Anglesey, North Wales, UK, July

Steven Kazlowski / Arctic tern (Sterna paradisaea) in flight outside the settlement of Longyearbyen, Spitsbergen, Svalbard Archipelago, Norway, July

Andrew Parkinson / Arctic tern (Sterna paradisaea) adult with some sand eel food for its growing chick, July, Farne Islands, UK. July

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

Andrew Parkinson / Arctic tern (Sterna paradisaea) chick calls impatiently for food from its absent parents, July, Farne Islands, UK. July

Andrew Parkinson / Arctic tern (Sterna paradisaea) chick waiting on a stone wall for its parents to return with some food, July, Farne Islands, UK. July

Brent Stephenson / Arctic Tern (Sterna paradisaea) in flight from below. Poolepynten, Svalbard, June.

Eric Baccega / Arctic Tern (Sterna paradisaea) in hovering flight with sunlight shimming from its wing feathers. Foxe Basin, Nunavut, Canada, July.

Eric Baccega / Arctic Tern (Sterna paradisaea) in flight. Foxe Basin, Nunavut, Canada, June.

Peter Cairns / White Tailed Sea Eagle (Haliaeetus albicilla) with Arctic Tern (Sterna paradisaea) harrying from above showing size difference. Flatanger, Norway, July.

Juan Carlos Munoz / Arctic terns (Sterna paradisaea) on an iceberg in Jokulsarlon Lagoon, Vatnajokull Glacier, Iceland, July 2009

Juan Carlos Munoz / Arctic terns (Sterna paradisaea) on an iceberg in Jokulsarlon Lagoon, Vatnajokull Glacier, Iceland, July 2009

Toby Roxburgh / Notice advising visitors to Inner Farne not to go on the beach to avoid disturbing a colony of nesting Arctic terns (Sterna paradisaea), Farne Islands, Northumberland, England, July 2010.

Roger Powell / Pair of Arctic Terns (Sterna paradisaea) in courtship display, Varanger Fjord, Arctic Norway. June

Roger Powell / Ruff (Philomachus pugnax) male "levitating" display to attract the attention of a Reeve (female) out on the marsh, with Arctic Terns (Sterna paradisaea) alongside, Varanger plateau, Arctic Norway. Jun...

Roger Powell / Pair of Arctic Terns (Sterna paradisaea) copulating, Varanger Fjord, Arctic Norway. June

Andrew Parkinson / Arctic Tern (Sterna paradisaea) flying in golden evening light. Shetland Islands, Scotland, UK, July (non-ex)

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

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

Andrew Parkinson / Arctic Skua (Stercorarius parasiticus) stealing fish from Arctic Tern (Sterna paradisaea) in flight, 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)

Steve Knell / Arctic Tern (Sterna paradisaea) portrait perched on post with wings held aloft, Iceland. June