Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District illuminated at night, Prague, Czech Republic 2011. No release available.

Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District, Prague, Czech Republic 2011. No release available.

Merryn Thomas / Remains of jetty in St Mary's Loch, Scottish Borders, Scotland, September 2011.

Linda Pitkin / 2020VISION / Dead man's fingers (Alcyonium digitatum), growing on rock faces below the kelp, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011. Did you know? Soft co...

Adrian Davies / Tombolo (island attached to mainland by narrow spit), St. Ninian's, Shetland Islands, Scotland, UK, June 2011

Eric Baccega / Female Harp seal (Phoca groenlandicus) surfacing at a breathing hole in the sea ice, Magdalen Islands, Gulf of St Lawrence, Quebec, Canada, March 2012

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Eric Baccega / Early morning mist and autumn colours in Grande Piles Village and St Maurice river. Quebec, Canada, October 2010

Alex Mustard / A split level digital composite showing a Basking shark (Ceterhinus maximus) feeding on plankton around St Michael's Mount, Cornwall, UK. June

Billy Black / Distant figures with kayak on Sandy Island, near Carriacou Island, the Grenadines, Caribbean, January 2010.

Michele Westmorland / Aeroplane coming in to land at Juliana Airport, Maho Bay, near Philipburg, St. Maarten (Dutch side of island) Caribbean. August 2006.

Michele Westmorland / Aeroplane landing at Juliana Airport, Maho Bay, near Philipburg, St. Maarten (Dutch side of island) Caribbean. August 2006.

Ross Hoddinott / St Michael's Mount by moonlight, Marazion, West Cornwall, England, UK. March 2010.

Ann & Steve Toon / Head portrait of Nile crocodile (Crocodylus niloticus) partically submerged, Crocodile Centre, St Lucia, KwaZulu Natal, South Africa. Captive

Onne van der Wal / Young man snorkeling with a Green turtle (Chelonia mydas) in the Grenadines, Caribbean, February 2010. Model Released.

Onne van der Wal / Young man snorkeling over seagrass bed, holding a starfish, The Grenadines, Caribbean. February 2010, Model released.

Onne van der Wal / Green turtle (Chelonia mydas) swimming over sea grass, Grenadines, Caribbean, February 2010.

Onne van der Wal / Shoal of fish beneath nets and small fishing boats in the Grenadines, Caribbean, February 2010.

Eric Baccega / Polar bear {Ursus maritimus} female in water, Captive, St Felicien Zoo, Quebec, Canada

Doug Perrine / Two Divers at Shipwreck, St Croix, Caribbean

Gavin Hellier / Buildings at Orient Beach, St Marin, Netherland Antilles, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Elevated view of luxury new housing developments lining Frigate Bay on St Kitts Southeast peninsula, St Kitts and Nevis, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Elevated view over the Southeast Peninsula coastline, St Kitts, St Kitts and Nevis, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Frigate Bay located southeast of Basseterre is an isthmus with the calm Caribbean-side Frigate Bay beach, St Kitts, St Kitts and Nevis, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Frigate Bay Beach, St Kitts, St Kitts and Nevis, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Frigate Bay Beach, Timothy Beach resort, St Kitts, St Kitts and Nevis, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District, Prague, Czech Republic 2011

Gavin Hellier / St. Vitus Cathedral, Charles Bridge and the Castle District illuminated at night, Prague, Czech Republic 2011

Gavin Hellier / Church of St Nikola and the Islands of St George and Gospa od Skrpjela, Perast, Bay of Kotorska, Montenegro, Balkans 2007

Gavin Hellier / St George's harbour in the historical town of St George, an UNESCO World Heritage Site, Bermuda 2007

Gavin Hellier / Elevated view over the French town of Marigot from Fort St. Louis at dusk, St Martin, Leeward Islands, Lesser Antilles, Caribbean, West Indies 2008

Gavin Hellier / Tour boat on the Spree Canal in front of St. Nicholas Quarter, Berlin, Germany, 2007

Gavin Hellier / Large cruise ship docked alongside Heritage Quay shopping district in St. John's, Antigua, Antigua and Barbuda, Leeward Islands, Lesser Antilles, Caribbean, West Indies, 2012

LYNN M. STONE / Reddish Egret (Egretta rufescens), dark morph in non-breeding plumage, hunting minnows in shallow water. St. Petersburg, Florida, USA, November.

LYNN M. STONE / Long-Billed Curlew (Numenius americanus) with Fiddler Crab (Unca sp.) in its beak. St. Petersburg, Florida, USA, April.

Kerstin Hinze / Nile Crocodiles (Crocodylus niloticus) basking at water side. St. Lucia, KwaZulu-Natal, South Africa, October.

Kerstin Hinze / Hippopotamus (Hippopotamus amphibius) splashing through water. St Lucia, KwaZulu-Natal, South Africa, October.

LYNN M. STONE / Trumpeter Swan (Cygnus buccinator) in low flight, with feet dropping about to land on water. St. Croix River, Wisconsin, USA, February.

LYNN M. STONE / Trumpeter Swan (Cygnus buccinator) stretching wings on water. St. Croix River, Wisconsin, USA, February.

LYNN M. STONE / Trumpeter Swan (Cygnus buccinator) landing on open stretch of St. Croix River in dwan light. Wisconsin, USA, February.

LYNN M. STONE / Tricolored Heron (Egretta tricolor) in breeding plumage, standing in saltwater lagoon. St. Petersburg, Florida, USA, April.

Konrad Wothe / King Penguin (Aptenodytes patagonicus) group coming ashore, St Andrew's Bay, South Georgia Island

Konrad Wothe / King Penguin (Aptenodytes patagonicus) group coming ashore near tourists, St Andrew's Bay, South Georgia Island

Nick Upton / Common limpets (Patella vulgata) encrusted with Common barnacles (Balanus balanoides) attached to sandstone boulder low on shoreline, exposed at low tide, St. Bees, Cumbria, UK, July.

Nick Upton / Common limpets (Patella vulgata) encrusted with Common barnacles (Balanus balanoides) attached to sandstone boulder low on shoreline, exposed at low tide, St. Bees, Cumbria, UK, July.

Nick Upton / Shanny (Lipophrys pholis) in shallow rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Shanny (Lipophrys pholis) in small rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Shanny (Lipophrys pholis) in small rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Shanny (Lipophrys pholis) in small rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Close up view of Shanny (Lipophrys pholis) in shallow rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Close up view of Shanny (Lipophrys pholis) in small rockpool on a falling tide, St. Bees, Cumbria, UK, July

Nick Upton / Shanny (Lipophrys pholis) in small rockpool on a falling tide, St. Bees, Cumbria, UK, July

Jean E. Roche / Aerial view of land used to produce turf for grass surfaces for football pitches etc, with irrigation bar in place, Mas St Sauveur, Petite Camargue, Southern France, June 2009

Jean E. Roche / Aerial view of land used to produce turf for grass surfaces for football pitches etc, with irrigation bar in place, Mas St Sauveur, Petite Camargue, Southern France, June 2009

Nick Upton / Low angle view of Feral pigeons (Columba livia) on lake shore and Coots (Fulica atra) swimming in St. James's Park, with people and Whitehall buildings in the background, London, UK, January.

Nick Upton / Low angle view of Coots (Fulica atra) and a Canada goose (Branta canadensis) in St. James's park, London, UK, January.

Vladimir Medvedev / Steller's sealion (Eumetopias jubatus) at water's surface, St. Jonah's island, Sea of Okhotsk, Far East Russia, July, Endangered species

Merryn Thomas / West cardinal mark on Lower Town Quay, St. Martin's, Isles of Scilly, UK.

Merryn Thomas / Three red fenders hung off the bow of passenger ferry "Voyager of St. Martin's", Lower Town Quay, St. Martin's, Isles of Scilly, UK

Merryn Thomas / Tender tied to small motorboat off St. Martin's, Isles of Scilly, UK

Merryn Thomas / Tender tied to small motorboat off St. Martin's, Isles of Scilly, UK

Onne van der Wal / Slow exposure of water flowing past a moving yacht with fishing rod, in the Grenadines, Caribbean. February 2010.

Onne van der Wal / Slow exposure of water flowing past a moving yacht in the Grenadines, Caribbean. February 2010.

Nick Upton / 2020VISION / Low angle view of Coots (Fulica atra), Feral pigeons (Columba livia) and tourists in St. James's Park, with Whitehall buildings in the background, London, UK, January.

Nick Turner / St.Cyrs Church with the Stroudwater Canal in the foreground, Gloucestershire, UK, June 2011.

Nick Turner / St.Cyrs Church with the Stroudwater Canal in the foreground, Gloucestershire, UK, June 2011.

Nick Turner / Coast Path information sign to Port Clais and St Justinian, Pembrokeshire, Wales, UK, June 2009.

Nick Turner / St.Lawrence's Church, Bourton on the Water, Gloucestershire, UK, November 2008.

Laurie Campbell / Slender St John's-wort (Hypericum pulchrum)flowers in rain, Beinn Eighe National Nature Reserve, Wester Ross, Scotland, July

Linda Pitkin / 2020VISION / Dahlia anemone (Urticina felina / Tealia felina), on bed of Common brittlestars (Ophiothrix fragilis), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, August 2011. Did...

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Kerstin Hinze / Aerial view of saltmarsh and tidal creeks, Green Coast, south of St Peter Ording, Eiderstedt, North Sea, Germany, June 2010

Alex Mustard / 2020VISION / John dory (Zeus faber) portrait, Babbacombe Bay, Devon, UK, October

Alex Mustard / 2020VISION / Planktonic amphipod (Parathemisto sp.) hitchhiking on common moon jellyfish (Aurelia aurita) in open water, St Abbs, Berwickshire, Scotland, April

LYNN M. STONE / Snowy egret (Egretta thula) preening, St. Petersburg, Florida, USA, June

LYNN M. STONE / Laughing gull (Leucophaeus atricilla) in breeding plumage, on tidal flat, St. Petersburg, Florida, USA, June

LYNN M. STONE / White ibis (Eudocimus albus) in post breeding plumage, eating mole crab and strand of sea grass, St. Petersburg, Florida, USA, June

LYNN M. STONE / White ibis (Eudocimus albus) hunting at edge of surf for mole crabs on Gulf of Mexico beach, St. Petersburg, Florida, USA, June

LYNN M. STONE / White ibis (Eudocimus albus) in post breeding plumage, with mole crab and strand of sea grass, St. Petersburg, Florida, USA, June

LYNN M. STONE / White ibises (Eudocimus albus) hunting at edge of surf on Gulf of Mexico beach, St. Petersburg, Florida, USA, June

LYNN M. STONE / Trumpeter swan (Cygnus buccinator) in early morning ice fog, St Croix River, Wisconsin, USA, February

LYNN M. STONE / Trumpeter swans (Cygnus buccinator) in ice fog in the early morning, St Croix River, Wisconsin, USA, February

Ernie Janes / St Benets Level at sunset, Drainage Mill, Norfolk Broads, UK

Jean E. Roche / Mouth of the Fuime Santo river at St Florent, Agriates desert, Corsica, France, September 2010

Brent Stephenson / Goliath Heron (Ardea goliath) standing in water looking for prey. St Lucia Wetlands, Natal, South Africa, January.

Nature Production / Harp Seal (Phoca groenlandica) pup coming out of icy water, Gulf of St.Laurence, Canada, March

Eric Baccega / Ice floe melting along the shore of St Lawrence River. Berthier-sur-Mer, Quebec, Canada, January 2009.

Eric Baccega / Ice floe melting on St Lawrence River. Quebec, Canada, January 2009.

Eric Baccega / Frontenac Castle and St Lawrence river ferry boat in melting ice. Quebec, Canada, March 2011.

Eric Baccega / Frontenac Castle and St Lawrence river ferry boat in melting ice. Quebec, Canada, March 2011.

Eric Baccega / Ice floe melting along the shore of St Lawrence River. Levis, Quebec, Canada, January 2009.

Eric Baccega / Great Blue Heron (Ardea herodias) standing on a rock in water. St-Laurent river, Quebec, Canada, February.