Juergen Freund / Crate of Spectacled flying fox (Pteropus conspicillatus) babies just arrived by plane from Brisbane after months of care, ready to be returned to the Tolga Bat Hospital for release back to the wild, A...

Petra Wegner / British Longhair Cats / Highlander, Lowlander, Britanica, four kittens in travel cage, 10 weeks

Roland Seitre / Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for maximum growth bef...

Florian Möllers / African Lions (Panthera leo) in a bare cage in Beijing Zoo, China, November.

Lisa Hoffner / A baby orphan Elephant (Loxodonta africana), named Murka, wounded by a poacher's spear is comforted by the touch of another elephant's trunk from outside its pen. David Sheldrick Wildlife Trust Eleph...

Juergen Freund / Mass of juvenile farmed Barramundi cod (Chromileptes altivelis) in cage, Indonesia.

Juergen Freund / Hook and line fishermen in dugout canoe and self made goggles catching a coral grouper for growing on in cage for the Live reef fish trade, Wakatobi, South Sulawesi, Indonesia

Juergen Freund / Jewelmer Pearlfarm, Pearl oyster (Pinctada maxima) in hanging cage, Palawan, Philippines, May 2009

Juergen Freund / Jewelmer Pearlfarm, cleaned Pearl oysters (Pinctada maxima) in hanging cage in the open sea, Palawan, Philippines, May 2009

Claudio Contreras / Great white shark (Carcharodon carcharias) passing divers cage, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, Pacific ocean, September

Michel Roggo / Atlantic salmon (Salmo salar) in cage of Salmon farm, Norway, Captive

Suzi Eszterhas / Rescued Chimpanzee (Pan troglodytes) within cage, Ngamba Island Chimpanzee Sanctuary, Uganda, Africa. Captive, June 2009.

Nick Garbutt / Polar Bear Cub (7-8 months) (Ursus maritimus) investigating photographer through wire fence. Lodge on the shores of Hudson Bay, Canada (Sept).

Nick Garbutt / Polar Bear Cubs (7-8 months) (Ursus maritimus) investigating photographer through wire fence. Lodge on the shores of Hudson Bay, Canada (Sept).

Karl Ammann / Orang utans (Pongo pygmaeus) in crowded cage, Tapei zoo, Taiwan

Jabruson / Mountain gorilla {Gorilla beringei} juvenile in wooden cage recovered from poachers, Virunga NP, Dem Rep Congo

Pete Cairns / European brown bear (Ursos arctos) in captivity standing up against cage wire. Nord-Trondelag, Norway.

Karl Ammann / Depressed Orang utan in Tapei zoo, Taiwan

Norbert Wu / Great White Shark (Carcharodon carcharias) near divers in shark cage, Australia

Martha Holmes / Chimpanzee {Pan troglodytes} hand on bar of cage.

Jabruson / Jaguar resting in zoo cage {Panthera onca} Transvaal, South Africa

Jeff Rotman / Great white shark with divers filming from protective cage. South Australia. Model released.

Gavin Hellier / Yuen Po Bird market, captive bird in cage, Kowloon, Hong Kong, China, 2007

Tom Marshall / Badger (Meles meles) bovine tuberculosis vaccination deployment. Staff from Cheshire Wildlife Trust, UK, prepare live traps for vaccination, including bedding in with vegetation along natural badger '...

Tom Marshall / Badger (Meles meles) bovine tuberculosis vaccination deployment. Staff from Cheshire Wildlife Trust, UK, prepare live traps for vaccination. Traps are carefully set into natural badger 'runs' along he...

Tom Marshall / Badger (Meles meles) bovine tuberculosis vaccination deployment. Staff from Cheshire Wildlife Trust, UK, prepare live traps for vaccination. Traps are carefully set into natural badger 'runs' along he...

Tom Marshall / Badger (Meles meles) bovine tuberculosis vaccination deployment. Staff from Cheshire Wildlife Trust, UK, prepare live traps for vaccination. Notes on the cage inform anyone coming across the trap of t...

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) in aviary at feeding time, the bats are fed a variety of fruit and drink milk and water, Tolga Bat Hospital, North Queensland, Australia, November 201...

Neil Aldridge / European Badger (Meles meles) is released from a cage trap following its successful vaccination against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011. Part of wi...

Neil Aldridge / European Badger (Meles meles) is released from a cage trap following its successful vaccination against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011

Neil Aldridge / To aid identification of vaccinated animals, a Defra Field Worker clips the hair of a European Badger (Meles meles) that has been restrained using plastic wickets in a cage trap during bovine tubercul...

Neil Aldridge / A European Badger (Meles meles) caught in a cage trap awaiting vaccination as part of bovine tuberculosis (bTB) vaccination trials on farmland in Gloucestershire, UK. June 2011. Part of winning portfo...

Neil Aldridge / Defra Field Workers arm a cage trap to trap a European Badger (Meles meles) as part of bovine tuberculosis (bTB) vaccination trials in Gloucestershire, UK June 2011.

Neil Aldridge / European Badger (Meles meles) emerges from a cage trap following its successful vaccination against bovine tuberculosis (bTB) during vaccination trials. The red dye on its flank denotes that the badge...

Neil Aldridge / European Badger (Meles meles) reverses out of a cage trap away from a Defra Field Worker following its successful vaccination against bovine tuberculosis (bTB) during vaccination trials in Gloucesters...

Neil Aldridge / A European Badger (Meles meles) caught in a cage trap awaiting vaccination as part of bovine tuberculosis (bTB) vaccination trials on farmland in Gloucestershire, UK June 2011.

Neil Aldridge / European Badger (Meles meles) trapped in a cage trap is vaccinated by Defra field worker against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011.

Neil Aldridge / European Badger (Meles meles) trapped in a cage trap is vaccinated by Defra field worker against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011.

Neil Aldridge / European Badger (Meles meles) trapped in a cage trap is vaccinated by Defra field worker against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011.

Neil Aldridge / European Badger (Meles meles) trapped in a cage trap is vaccinated by Defra field worker against bovine tuberculosis (bTB) during vaccination trials in Gloucestershire, UK June 2011.

Neil Aldridge / To aid identification of vaccinated animals, a Defra Field Worker sprays dye onto the hair of a European Badger (Meles meles) caught in a cage trap during bovine tuberculosis (bTB) vaccination trials...

Mark Carwardine / Asiatic black / Moon bear (Ursus thibetanus) Utyos Wildlife Rehabilitation Centre, Kutuzovka Village, Russian Far East, Vulnerable species

Mark Carwardine / Asiatic black / Moon bear (Ursus thibetanus) in cage at Utyos Wildlife Rehabilitation Centre, Kutuzovka Village, Russian Far East, Vulnerable species

Mark Carwardine / Asiatic black / Moon bear (Ursus thibetanus) chewing at the wire of its cage, Utyos Wildlife Rehabilitation Centre, Kutuzovka Village, Russian Far East, Vulnerable species

Mark Carwardine / Cage-diving for Great white shark {Carcharodon carcharias} Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Watching a Great white shark (Carcharodon carcharias) from inside a diving cage, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Tuna used for bait in great white shark diving cage, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Firing chum slick into the water as bait for Great white shark cage-diving, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Cage-diving with Great white shark (Carcharodon carcharias) Guadalupe Island, Mexico (North Pacific) Shark taking bait in front of cage

Mark Carwardine / Lowering diving cage into the sea for viewing Great white shark, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Lowering diving cage into the sea for viewing Great white shark, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Cage for watching Great white sharks in the sea, Western Cape, South Africa

Mark Carwardine / Divers in cage watching Great white sharks, Dyer Is, Western Cape, South Africa

Enrique Lopez-Tapia / Caged Smooth coated otters (Lutragale perspicillata) used for traditional fishing practices. The Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Si...

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside house in cage, feeding on watermelon, Tolga Bat Hospital, Atherton, North Queensland. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples and watermelon, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage with volunteer Andrew providing clean water, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying foxes (Pteropus conspicillatus) inside cage feeding on stringed apples, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.

Juergen Freund / Spectacled flying fox orphans (Pteropus conspicillatus) hanging from rehab cage, Tolga Bat Hospital, Atherton, North Queensland, Australia. December 2007.

Juergen Freund / Spectacled flying fox orphans (Pteropus conspicillatus) hanging from rehab cage, Tolga Bat Hospital, Atherton, North Queensland, Australia. December 2007.

Sergey Gorshkov / Brown Bear (Ursus arctos)eyeing photographer Sergey Gorshkov, Kamchatka, Russia

Merryn Thomas / Common marmoset (Callithrix jacchus) in cage in zoo, Cumbria, UK.

Petra Wegner / Briard / Berger de Brie, puppy standing in travel cage, 9 weeks

Petra Wegner / British Shorthair Cat, kitten in travel cage, 8 weeks

Petra Wegner / British Longhair Cat / Highlander, Lowlander, Britanica, kitten in travel cage, 10 weeks

Petra Wegner / British Longhair Cats / Highlander, Lowlander, Britanica, four kittens in travel basket / cage, 10 weeks

Roland Seitre / Primate Conservation Research and Rescue rangers taking a monkey cage from the back of their vehicle. Ukunda, Diani Beach, Kenya.

Roland Seitre / Boy with pet Blue winged parrotlet (Forpus xanthopterygius crassirostris) in cage, Trinidad, Beni, Bolivia, January 2008

Roland Seitre / Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for maximum growth bef...

Roland Seitre / Manual capture and preprocessing of Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species, June 2009, Wild caught fish are re...

Roland Seitre / Manual capture and preprocessing of Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species, June 2009. Wild caught fish are re...

Roland Seitre / Manual capture of Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, June 2009, Critically Endangered species. Wild caught fish are reared in large fish...

Roland Seitre / Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for maximum growth bef...

Roland Seitre / Aerial view of fish cage for fish farming Southern bluefin tuna (Thunnus maccoyii), Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for ma...

ZSSD / California Ground Squirrel (Spermophilus beecheyi) being released as part of relocation project to build nest burrows for burrowing owls, California

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, in cage.

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, in cage.

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, in cage.

Florian Möllers / Siberian Tiger (Panthera tigris sibirica / altaica) in a cage admired by Chinese Zoo visitors. Beijing Zoo, China, November 2006.

Peter Cairns / 2020VISION / White tailed sea eagle (Haliaeetus albicilla) release pens, part of the East Scotland Sea Eagle reintroduction project, Fife, Scotland, UK, June 2011

Peter Cairns / 2020VISION / Stop sign on aviary as part of the East Scotland Sea Eagle reintroduction project, Fife, Scotland, UK, June 2011

Peter Cairns / 2020VISION / Shipping crates containing newly imported Norwegian White tailed sea eagle chicks (Haliaeetus albicilla) loaded into a car at Edinburgh airport, part of the East Scotland Sea Eagle reintroduction proj...

Peter Cairns / 2020VISION / Shipping crate containing newly imported Norwegian White tailed sea eagle chick (Haliaeetus albicilla), part of the East Scotland Sea Eagle reintroduction project, Fife, Scotland, UK, June 2011

Bryan and Cherry Alexander / Siberian sable (Martes zibellina) in cage at a fur farm in the Yamal, Western Siberia, Russia, August 2008.

Philippe Clement / Coypu / Nutria (Myocastor coypus) caught in live trap at lakeside. La Brenne, France, April.

Philippe Clement / Coypu / Nutria (Myocastor coypus) caught in live trap at lakeside. La Brenne, France, April.

Philippe Clement / Coypu / Nutria (Myocastor coypus) caught in live trap at lakeside. La Brenne, France, April.

Philippe Clement / Coypu / Nutria (Myocastor coypus) caught in live trap at lakeside. La Brenne, France, April.

Philippe Clement / Coypu / Nutria (Myocastor coypus) caught in live trap at lakeside. La Brenne, France, April.