Ross Hoddinott / Derwent Water, fence, gate and flooding, looking to Catbells mountain, near Keswick, The Lake District, Cumbria, UK. October 2012.

David Pattyn / Burrowing Owl (Athene cunicularia) perched on a wooden fence backlit at sunrise, Southern Pantanal, Mato Grosso do Sul State, BrazilAugust

Ross Hoddinott / 2020VISION / River Exe, near Winsford, showing river correctly fenced to stop cattle from polluting the river, or eroding the river banks. Healthy example of river habitat. Exmoor National Park, Somerset, UK. May...

Fabrice Cahez / Roe Deer (Capreolus capreolus) jumping over barbed wire fence in snow. Vosges, France, January.

Charlie Summers / Rocky Mountain Bighorn sheep (Ovis canadensis) female jumping barbed wire fence, Montana, USA

Petra Wegner / Neva Masquarade / Siberian Forest Cat, portrait of seal-tabby-point coated tomcat, sitting on log in snow, with picket fence behind

Petra Wegner / British Shorthair Cat, blue coated tomcat, sitting in snow, with picket fence behind

Petra Wegner / Sacred Cat of Burma / Birman, chocolate-point coated, portrait sitting on log in snow, with picket fence behind

Petra Wegner / Neva Masquarade / Siberian Forest Cat, blue-silver-tabby-point coated, sitting on log in snow, with picket fence behind

Petra Wegner / Australian Shepherd, red-tri coated, portrait sitting in snow, with picket fence behind

Petra Wegner / Australian Shepherd, red-tri coated, portrait lying in snow panting, with picket fence behind

Petra Wegner / Papillon / Continental Toy Spaniel / Butterfly Dog, portrait sitting in snow, panting, with picket fence behind

Petra Wegner / Scottish Fold cat, tabby short haired, portrait sitting in snow with picket fence behind

Andy Sands / European Cuckoo (Cuculus canorus) female perched on fence post, Isle of Coll, Scotland, UK, June

Hanne & Jens Eriksen / European cuckoo {Cuculus canorus} resting on fence on migration route, UAE, October

Richard Du Toit / Aerial view of traditional fishing fences for trapping fish, Kosi bay, South Africa

Gary K. Smith / Egmere Church on frosty morning, Norfolk, UK, January.

Kirkendall-Spring / Fenced pathway leading down to the Atlantic Ocean, Carolina Beach, North Carolina, USA

Kirkendall-Spring / View of Tipton Place in Cades Cove, Great Smoky Mountains NP, Tennessee, USA

Gavin Hellier / Avalanche prevention fences, St Anton am Arlberg, Tirol, Austria, 2008

Gavin Hellier / Avalanche prevention fences, St Anton am Arlberg, Tirol, Austria, 2008

Kirkendall-Spring / Fence line, Buffalo Ranch, Lamar Valley of Yellowstone National Park. Wyoming, USA, January 2012

Tony Phelps / Warning sign explaining that rhino horns within reserve are poisoned and coloured. Private game reserve, near Ceres, Karoo, South Africa, November

Wild Wonders of Europe / Muñoz / Retuerta horses (Equus ferus caballus) once native, herd now released to graze Campanarios de Azaba Biological Reserve, a rewilding Europe area, Salamanca, Castilla y Leon, Spain

Ann & Steve Toon / Hedgehog (Erinaceus europaeus) captive, UK, March

Ross Hoddinott / Derwent Water, fence with flooding at sunset, near Keswick, The Lake District, Cumbria, UK. October 2012.

Ross Hoddinott / Panoramic view of Derwent Water, fence, gate and flooding, looking to Catbells mountain, near Keswick, The Lake District, Cumbria, UK. October 2012.

Markus Varesvuo / Spotted Flycatcher (Muscicapa striata) perched on fence, Uto Finland May

Neil Aldridge / African wild dogs (Lycaon pictus) pack looking for prey along the fenced boundary of Venetia Limpopo Nature Reserve, South Africa. African wild dogs often strategically chase prey towards game fences...

Mark Carwardine / Predator fence near Te Anua, South Island, New Zealand, designed to keep introduced predators out of designated zones to protect flightless birds, January 2009

Andrew Parkinson / Hanuman / Northern Plains Grey Langur (Presbytis entellus). A youngster prepares to leap from the controversial fence that now surrounds large sections of Bandhavgarh National Park, to a tree branch h...

Peter Cairns / Eurasian wolves (Canis lupus lupus) being photographed in enclosure at education centre, Norway, captive

Ernie Janes / Mass of Corn Chamomile (Anthemis arvensis) in flower around old sheep hurdle, Norfolk, UK, June

Eric Medard / Common buzzard (Buteo buteo) flying over wire fence in winter, France, February

Eric Medard / Common buzzard (Buteo buteo) perched on fence in winter, France, February

Eric Medard / Common buzzard (Buteo buteo) perched on fence in winter, France, February

Eric Medard / Little owl (Athene noctua) on fence post, France, June

Eric Medard / Little owl (Athene noctua) sitting on fence post, France, July

Eric Medard / Common buzzard (Buteo buteo) trapped on a barbed wire fence, France, July

Eric Medard / Common buzzard (Buteo buteo) trapped in a barbed wire fence, France, July

Andy Rouse / Little owl (Athena noctua) coming in to land on fence post, UK, June

Andy Rouse / Little owl (Athena noctua) coming in to land on fence post, UK, June

Andy Rouse / Little owl (Athena noctua) on post, UK, June

Ann & Steve Toon / Sign on game farm perimeter fence to deter rhino poachers explaning rhinos there have been dehorned, Hoedspruit, Limpopo, South Africa, June 2012. Editorial use only.

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) killed in barbed wired fence, Queensland, Australia. December 2007.

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) killed in barbed wired fence, Queensland, Australia. December 2007.

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

David Tipling / 2020VISION / Skylark (Alauda arvensis) perched on fence post, Cambridgeshire Fens, UK, April

David Tipling / 2020VISION / Newt fence erected at lagoon creation area to ensure Great crested Newts don't find their way into work area and get squashed. Rutland Water, summer 2010.

Roland Seitre / Entrance and information signs for the Fathala reserve with cut-out giraffe, rhino and antelope. Toubacouta, Senegal.

Roland Seitre / Anthony Molineux locking the predator fence at the marsupial reserve. Desert Park, Alice Springs, Northern Territory.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) climbing along beach fence. Kenya, Africa.

Roland Seitre / Fence allowing grazing-land to recover - to the left is over-grazed land, to the right is recovering land. Scimitar Oryx rehabilitation program, Reserve du Ferlo Nord, near Ranero in Senegal, 2002.

Ernie Janes / Felbrigg Great Wood, Norfolk, UK, early November

Gerrit Vyn / Loggerhead shrike (Lanius ludovicianus) hunting from a fence post on the coastal prairie of Cameron Parrish, Louisiana, USA, December

Paul Harris / 2020VISION / Fencing put up for the release of Exmoor ponies at Street Heath for conservation grazing, Somerset Levels, UK, June 2011

Robin Chittenden / Sand martins (Riparia rioaria) perched on wire fence, Cley NWT, Norfolk, UK, July

Robin Chittenden / Barn swallow portrait (Hirundo rustica) Cley NWT, Norfolk, UK, July

Robin Chittenden / Montagu's harrier (Circus pygargus) perching on fence, La Serena Steppes Badajoz Extremadura Spain, March

Guy Edwardes / 2020VISION / Fence bordering field of Wheat and track with Halnaker Windmill in the background, Chichester, South Downs National Park, Sussex, England, UK, July 2011, a monochrome copy of 01367058

Guy Edwardes / 2020VISION / Fence bordering field of Wheat and track with Halnaker Windmill in the background, Chichester, South Downs National Park, Sussex, England, UK, July 2011, monochrome copy of 01367056.

Guy Edwardes / 2020VISION / Fence bordering field of Wheat and track with Halnaker Windmill in the background, Chichester, South Downs National Park, Sussex, England, UK, July 2011, 01367057 is monochrome copy of this image

Andrew Parkinson / Stonechat (Saxicola torquata) female perched on a frost covered fence post, Dumfries and Galloway, Scotland, UK , December.

Terry Whittaker / 2020VISION / Wicken Fen under dark clouds landscape, Cambridgeshire, UK, June 2011

Ross Hoddinott / 2020VISION / Field with fencing along hedgerow and gateway, Denmark Farm Conservation Centre, Lampeter, Wales, UK. June 2011.

Peter Cairns / 2020VISION / Fence for management of habitat for waders and corncrake, RSPB Balranald reserve, North Uist, Western Isles / Outer Hebrides, Scotland, UK, May 2011

Gary K. Smith / Man constructing traditional wattle willow-weave fence. Norfolk, UK, March.

Ernie Janes / Ancient Oak tree protected by fence and gateway, Felbrigg Hall, Norfolk, UK

Jeff Wilson / Electric wires surround the camp for filming Arctic wolves on Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for the BBC series, Frozen Planet.

Ernie Janes / Gate and path buried by drifting sand, Norfolk, UK

Nick Upton / 2020VISION / Mixed flock of 4 month old and 16 month old Common / Eurasian cranes (Grus grus), released by the Great Crane Project onto the Somerset Levels and Moors, gathered to roost at sunset beside a dummy sur...

Nick Upton / 2020VISION / Six juvenile Common / Eurasian cranes (Grus grus), reared by the Great Crane Project, flying out from their initial release enclosure to forage on the Somerset Levels and Moors, with cattle in the bac...

Nick Upton / 2020VISION / Six juvenile Common / Eurasian cranes (Grus grus), reared by the Great Crane Project, flying out from their initial release enclosure to forage on the Somerset Levels and Moors, with cattle and houses...

Ann & Steve Toon / Pearl spotted owlet (Glaucidium perlatum) perched on fence post at night, Kgalagadi Transfrontier Park, South Africa, November

Will Watson / Sessile Oaks (Quercus petraea) in a snow-covered field. Ceredigion, Wales, December 2010.

David Woodfall / Organically reared saddleback sow, Domestic pig (Sus scrofa domestica) in winter with farmers, Gwynedd, North Wales, UK, February 2009

Nick Upton / Aerial view of Domestic sheep (Ovis aries) grazing on Horsford Castle Hill, the remains of an 11th century Mott and Bailey fortress, now grassed over to become pastureland, Near Norwich, Norfolk, UK,...

Adrian Davies / Sign to a Bald Eagle nest (Haliaeetus leucocephalus). Honeymoon Island, Florida, USA, January 2011

Florian Möllers / Rear view of Crested lark (Galerida cristata) perched on fence at a construction site in Berlin, Germany, May

Florian Möllers / Crested lark (Galerida cristata) perched on fence at a construction site in Berlin, Germany, May

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.

Nick Upton / Migrant male Red-backed shrike (Lanius collurio) perched on barbed wire fence. Lesbos / Lesvos, Greece, August.

Nick Upton / Immature Red-backed shrike (Lanius collurio) perched on wire fence. Lesbos / Lesvos, Greece, August.

Charlie Summers / Rocky Mountain Bighorn sheep (Ovis canadensis) ram with full curl horns, jumping barbed wire fence, Montana, USA

Markus Varesvuo / Corn Bunting (Miliaria / Emberiza calandra) perched on barbed wire fence, Spain, September

Markus Varesvuo / Two Corn Buntings (Miliaria / Emberiza calandra) perched on barbed wire fence, Spain, September

Markus Varesvuo / Corn Bunting (Miliaria / Emberiza alandra) perched on barbed wire, Spain, September

Bryan and Cherry Alexander / Nenets girl helping to herd Reindeer / Caribou (Rangifer tarandus) at a corral. Yamal, Siberia, Russia, 1993.

Petra Wegner / Three Australian Shepherd puppies, black-tri coated, aged 6 weeks, playing together in snow, with picket fence behind

Petra Wegner / Australian Shepherd, portrait of blue-merle coated puppy aged 6 weeks, sitting in snow with picket fence behind

Petra Wegner / Two Bengal Cats, scenting one other, in snow with picket fence behind