Mark Taylor / Waves breaking against sea wall and cliffs, Seaford, Sussex, England, UK, 15th February 2014.

Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling over edge of a low retaining wall in a garden, with house in the background, Wiltshire, England, UK, April . Property released.

Claus Meyer / Spider web retaining raindrops, Atlantic Forest ecosystem, Brazil

David Woodfall / Waves crashing against the sea wall with a coast guard walking along it, Rhyl, Wales. January.

Dave Bevan / Flock of Turnstones (Arenaria interpres) feeding on a sea wall, disturbed by a runner, Devon, England, UK, January

Dave Bevan / Flock of Turnstones (Arenaria interpres) feeding on a sea wall, Devon, England, UK, January

Nick Upton / Red dead nettle (Lamium purpureum) flowering on a retaining wall, Bath, UK, March.

Ernie Janes / Sea wall and housing vulnerable to flooding around The Wash, Snettisham, Norfolk, England, UK, February 2015.

Ernie Janes / Sea wall and housing vulnerable to flooding around The Wash, Snettisham, Norfolk, England, UK, February 2015.

Jean E. Roche / Dyke restored to protect Salin de Giraud saltpans from sea, Camargue, France, February.

Ernie Janes / Repairs to Cromer sea wall after the tidal surge in December 2013, Norfolk, England, UK. January 2015.

Christophe Courteau / Spring tide waves at Saint-Malo, Ille-et-Vilaine, Brittany, France. February 2014.

Loic Poidevin / Waves crashing at harbor entrance during storm. Prieur Saint Nicolas, Les Sables d' Olonne, Vendee, France, March 2014.

Charlie Summers / Four black-legged kittiwakes (Rissa tridactyla) resting on sea wall at Stromness, Orkney Islands, Scotland, UK, July.

Ernie Janes / View of coastal sea defences, Walcott, Norfolk, England, UK, February.

Nick Upton / Flowering Red Valerian (Centranthus ruber) growing from drainage pipe in a retaining wall, Looe, Cornwall, UK, June

Nick Upton / Flowering Red Valerian (Centranthus ruber) growing from drainage pipe in a retaining wall, with cars, buildings and Looe harbour in the background, Cornwall, UK, June 2012

Kim Taylor / Red mason bee (Osmia rufa) female building pollen retaining wall of mud and sand to separate egg cells in artificial nest box, Surrey, UK, April

Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling over edge of a low retaining wall in a garden with house in the background, Wiltshire, England, UK, April . Property released.

Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling along low retaining wall in a garden with house in the background, Wiltshire, England, UK, April . Property released.

Jane Burton / Common Frog (Rana temporaria) 9-week-old froglet with fully developed limbs but still retaining larval lips and tail

Jane Burton / Common Frog (Rana temporaria) 9-week-old froglet with fully developed limbs but still retaining larval lips and tail

Paul D Stewart / Map of the World with Voyage of the Beagle coloured in red. Appendix from 'The Voyage of HMS Beagle' by Charles Darwin (Cover Title) New Edition 1890 John Murray Publishers. Coloured print, retaining...

Paul D Stewart / Map of South America with Voyage of the Beagle coloured in red. Appendix from 'The Voyage of HMS Beagle' (Cover Title) by Charles Darwin, New Edition 1890 John Murray publishers. Coloured print, retai...

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) juvenile, standing on sea wall, Port Philip Bay, Sandringham, Victoria, Australia.

Terry Whittaker / Sand martins (Riparia riparia) flying to and from their nests in old drainage pipes along River Mersey retaining walls. Greater Manchester, UK.

Nick Upton / Garden snail (Cornu aspersum / Helix aspersa) crawling over an oak sleeper retaining a garden lawn with a house in the background with its beating heart visible through the shell, Wiltshire, UK, April...

Nick Upton / Timelapse of a Garden snail (Cornu aspersum / Helix aspersa) crawling over an oak sleeper retaining a garden lawn with buildings and a greenhouse in the background, Wiltshire, UK, April.

Matthew Maran / Sea Wall at sunset New Forest National Park, Hampshire, England, UK. August 2018.

John Waters / Lesser black-backed gull (Larus fuscus) retaining some juvenile plumage, in flight in Bristol, UK, August 2020.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks, nesting in old drainage pipe along River Mersey retaining wall. Greater Manchester, England, UK. June.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks, nesting in old drainage pipe along River Mersey retaining wall. Greater Manchester, England, UK. June.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks on nest in old drainage pipe along River Mersey retaining wall. Greater Manchester, England, UK. May 2020.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks nesting in old drainpipes along River Mersey retaining wall. Greater Manchester, England, UK. May 2020.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks at nest in in old drainage pipe along River Mersey retaining wall. Greater Manchester, England, UK. June.

Terry Whittaker / Sand martin (Riparia riparia) adults feeding chicks nesting in old drainage pipes along River Mersey retaining wall. Greater Manchester, England. June.

Terry Whittaker / Sand martin (Riparia riparia) feeding chicks on nest in old drainage pipe along River Mersey retaining wall. Greater Manchester, England. June.

Shane Gross / Bonnethead shark (Sphyrna tiburo) hunting amongst fish in Turtlegrass (Thalassia testudinum) seagrass bed, view from below. Bonnetheads are the first known omnivorous shark, eating seagrass and retain...

Terry Whittaker / Sand martins (Riparia riparia) returning to chicks in nest located in old drainage pipes along River Mersey retaining walls, Greater Manchester, UK.

Terry Whittaker / Pair of Sand martins (Riparia riparia) returning to chicks at nest located in old drainage pipes along River Mersey retaining walls, Greater Manchester, UK.

Nigel Cattlin / Workers repairing mud irrigation levies for small individual, experimental, trials plots in paddy rice (Oryza sativa), Luzon, Philippines

Nigel Cattlin / Irrigation canals and newly repaired mud irrigation levies channeling water to paddy rice crops in ear, Luzon, Philippines

Nigel Cattlin / Newly repaired neat, mud levies for irrigation water in young seedling paddy rice fields, Luzon, Philippines

Nick Upton / White-lipped snail (Cepaea hortensis) crawling over an oak sleeper retaining a garden lawn with a greenhouse in the background, Wiltshire, UK, April.

Nick Upton / Garden snail (Cornu aspersum / Helix aspersa) crawling over an oak sleeper retaining a garden lawn, Wiltshire, UK, April.

Nick Upton / Garden snail (Cornu aspersum / Helix aspersa) crawling over an oak sleeper retaining a garden lawn with buildings and a greenhouse in the background, Wiltshire, UK, April.

Nick Upton / Garden snail (Cornu aspersum / Helix aspersa) crawling over an oak sleeper retaining a garden lawn, Wiltshire, UK, April.

Nick Upton / White-lipped snail (Cepaea hortensis) crawling over an oak sleeper retaining a garden lawn with buildings and a greenhouse in the background, Wiltshire, UK, April.