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

Juergen Freund / 45,000 Bangus / Milkfish (Chanos chanos) growing in sea cage, sea cages grow bangus slower than in ponds but the taste is superior, Sarangani, Philippines, April 2010.

Juergen Freund / 45,000 Bangus / Milkfish (Chanos chanos) growing in sea cage, sea cages grow bangus slower than in ponds but the taste is superior, Sarangani, Philippines, April 2010.

Juergen Freund / Snorkeler swimming amongst 45,000 Bangus / Milkfish (Chanos chanos) growing in sea cage, sea cages grow bangus slower than in ponds but the taste is superior, Sarangani, Philippines, April 2010.

Juergen Freund / Fisherman protected with a groin and face guard made of stainless steel brings together the net to take out the fish from a fish cage. These men harvested about 4 tons of Milkfish (Chanos chanos) from...

Juergen Freund / Live Reef Fish grower: Coral trout (Plectropomus leopardus) kept in floating cage to fatten to desirable size for market, Palawan, Philippines, May 2009 . NOT AVAILABLE FOR MAGAZINE USE IN GERMAN-S...

Juergen Freund / Fishermen brings together the net to take out the fish from a fish cage. These men harvested about 4 tons of Milkfish (Chanos chanos) from fish cage. The fish are immediately put on ice and brought t...

Mark Carwardine / Keeper with rescued (orphaned) chimpanzees (Pan troglodytes) Ngamba Island Chimpanzee Sanctuary, Uganda, April 2007

Jenny E. Ross / Adult male Asiatic black bear (Ursus thibetanus) being rescued from a "bile farm" by the Animals Asia Foundation. Prior to being rescued, he was kept confined in a tiny cage, and his bile was extracte...

David Tipling / Bird keeper sitting in park with his Hwamei (Garrulax canorus) in central Beijing, China. September 2008

Petra Wegner / Girl fixing water bottle to cage for Guinea Pigs

Petra Wegner / Boy placing hay in cage for Guinea Pigs

Petra Wegner / Girl providing water in water bottle to Guinea Pigs in cage

Petra Wegner / Girl feeding carrot to Guinea Pig in cage

Petra Wegner / Girl providing bowl of dried food for Guinea Pigs in cage

Petra Wegner / Girl watching two Guinea Pigs in open cage

Petra Wegner / Boy preparing cage for Guinea Pigs

Petra Wegner / Cavalier King Charles Spaniel, tricolour, watching two Guinea Pigs in cage

Petra Wegner / Two Guinea Pigs in an open cage

Petra Wegner / Girl feeding Guinea Pigs in cage from bowl of dried food

Petra Wegner / Girl placing bowl of dried food in cage for two Guinea Pigs

Petra Wegner / Girl placing Guinea Pig in its cage

Petra Wegner / Boy placing hay in cage for Guinea Pigs

Petra Wegner / Girl placing bowl of dried food in cage for two Guinea Pigs

Petra Wegner / Feeding carrot to Guinea Pigs in cage

Petra Wegner / Girl placing Guinea Pig in its cage

Petra Wegner / Girl placing Guinea Pig in its cage

Petra Wegner / Girl feeding Guinea Pigs in cage with dried food from bowl

Petra Wegner / Boy placing hay in cage for Guinea Pigs

Petra Wegner / Boy placing hay in cage for Guinea Pigs

Petra Wegner / Girl feeding Guinea Pigs in cage with dried food from bowl

Petra Wegner / Girl feeding carrot to two Guinea Pigs in cage

Petra Wegner / Girl feeding carrot to Guinea Pig in cage

Petra Wegner / Girl feeding carrot to Guinea Pig in cage

Petra Wegner / Boy placing hay in cage for Guinea Pigs

Petra Wegner / Girl feeding carrot to Guinea Pig in cage

Petra Wegner / Girl feeding carrot to two Guinea Pigs in cage

Suzi Eszterhas / Leopard (Panthera pardus) trapped by local farmers, and being released by reserve wardens into a protected area. Masai Mara Game Reserve, Kenya, East Africa, October 2006

Mark Carwardine / Mauritius kestrel (Falco punctatus) perched in cage, threatened / endangered species, once the rarest bird in the world, Mauritian Wildlife Foundation breeding centre, Mauritius, Indian Ocean, captiv...

Mark Carwardine / Rodrigues fruit bat / flying fox (Pteropus rodricensis) hanging upside-down in cage, Critically endangered, Mauritian Wildlife Foundation breeding centre, Mauritius, Indian Ocean, captive

Mark Carwardine / Mauritius kestrel (Falco punctatus) in cage, threatened / endangered species, once the rarest bird in the world, Mauritian Wildlife Foundation breeding centre, Mauritius, Indian Ocean, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) feeding in cage at feeding bowls, Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Adrian Davies / Warning sign and protective cage over nest site of Loggerhead Turtle (Caretta caretta) Platanias, Crete, Greece. July 2010

Mark Carwardine / Black rhinoceros (Diceros bicornis) Critically endangered species, at Dvur Kralove Zoo, Czech Republic

Mark Carwardine / Northern white rhinoceros (Ceratotherium simum cottoni) in transport crate in cargo hold of Boeing 747 aeroplane between Prague and Nairobi, December 2009, Extinct in the wild, only eight left in cap...

Mark Carwardine / Zoo keeper saying farewell to Northern white rhinoceros (Ceratotherium simum cottoni) in transport crate at Dvur Kralove Zoo, Czech Republic, ready for departure to Kenya, December 2009, Extinct in th...

Pete Oxford / Dogs in cage kept for eating. Jianchuan County, bordering Lijiang. Yunnan Province. China

Jeff Rotman / Close-up of a Bull / Zambezi shark (Carcharhinus leucas) approaching shark cage. This species is responsible for most attacks in South Africa. Natal Sharks Board - Umhlanga, South Africa, Indian Ocean

Jeff Rotman / Great White shark (Carcharodon carcharias) swimming past protective cage, Dangerous Reef, Great Australian Bight, South Australia

Jeff Rotman / Diver filming Great White shark (Carcharodon carcharias) from protective cage, Dangerous Reef, Great Australian Bight, South Australia Model released.

Jeff Rotman / Diver filming Great White shark (Carcharodon carcharias) from protective cage, Dangerous Reef, Great Australian Bight, South Australia Model released.

Pete Oxford / Rat (Rattus sp) in trap for luring Galapagos Hawk (Buteo galapagoensis) for capture and study, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Hawk (Buteo galapagoensis) lured by caged rat for capture and study, Galapagos Islands, Ecuador

Suzi Eszterhas / Rescued Chimpanzees (Pan troglodytes) adult and juvenile in sleeping area, with bowl of warm Posho meal. Ngamba Island Chimpanzee Sanctuary, Uganda, Africa. Captive, June 2009.

Suzi Eszterhas / Young Chimpanzee (Pan troglodytes) named Afrika, behind bars, Ngamba Island Chimpanzee Sanctuary. Uganda, Africa. Captive. June 2009.

Pete Oxford / Spanish Lynx (Lynx pardinus) at captive breeding center, Andalusia, Spain

Pete Oxford / Spanish Lynx (Lynx pardinus) at captive breeding center, Andalusia, Spain

Laurie Campbell / Operations at salmon farm cage, Loch Sunart, Argyll, Scotland, May

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) Xiang Xiang, the first captive raised panda released into the wild, emerging from release cage, Wolong Nature Reserve, China

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) carrying Xiang Xiang to release site, first captive-born panda to be released into the wild, Wolong Nature Reserve, endangered, China

Albert Lleal / Brown Bear (Ursus arctos), captive gnawing on bars of cage, Spain

Suzi Eszterhas / Chimpanzee (Pan troglodytes) rehabilitated group being fed by caretaker Stany Nyomolwi, Ngamba Island Chimpanzee Sanctuary, Uganda

Stephen Belcher / Sumatran Rhinoceros (Dicerorhinus sumatrensis) with sanctuary keeper, Way Kambas National Park, Sumatra, Indonesia

Suzi Eszterhas / Sea otter {Enhydra lutris} 6 weeks pup being groomed by hand in rehabilitation cage, Monterey Bay Aquarium, California, USA

Suzi Eszterhas / Sea otter {Enhydra lutris} 6 weeks pup being towel dried by hand in rehabilitation cage, Monterey Bay Aquarium, California, USA

Suzi Eszterhas / Sea otter {Enhydra lutris} 6 weeks pup being fed clams by hand in rehabilitation cage, Monterey Bay Aquarium, California, USA

Suzi Eszterhas / Sea otter {Enhydra lutris} 6 weeks pup in rehabilitation cage, Monterey Bay Aquarium, California, USA

Paul Hobson / Heligoland trap for catching birds, Spurn Point, Yorkshire, UK

Nick Garbutt / Film crew aboard boat run by Chris and Monique Fallows. Cage filming Great White Sharks off Seal Island in False Bay, Cape, South Africa.

Jeff Rotman / Great White Shark (Carcharodon carcharias) attacking protective shark diving cage, Dangerous Reef, South Australia

Jeff Rotman / Diver filming Great White Shark (Carcharodon carcharias) from protective shark diving cage, Dangerous Reef, South Australia Model released.

Jeff Rotman / Close-up of Zambezi / Bull shark (Carcharhinus leucas) approaching shark cage. Responsible for most attacks in South Africa. Natal Sharks Board, Umhlanga, South Africa

Jeff Rotman / Great blue shark (Prionace glauca) approaching dive cage with two divers and three shark in background. California, Pacific Ocean. Model released.

Eric Baccega / Tourist with giant panda at Bifengxia Giant Panda Breeding and Conservation Center,Yaan, Sichuan, China (Ailuropoda melanoleuca)

Eric Baccega / Male giant panda aged 5 years watching mating video for stimulation at Bifengxia Giant Panda Breeding and Conservation Center,Yaan, Sichuan, China (Ailuropoda melanoleuca)

Eric Baccega / Keeper feeding giant pandas (Ailuropoda melanoleuca) at the Chengdu Research Base of Giant Panda Breeding

Eric Baccega / Male giant panda aged 5 years watching mating video for stimulation at Bifengxia Giant Panda Breeding and Conservation Center,Yaan, Sichuan, China (Ailuropoda melanoleuca)

Karl Ammann / Bonobo {Pan paniscus} portrait through glass of zoo cage, San Diego Zoo, California, USA

Karl Ammann / Photographer Karl Ammann interacting with Bonobo {Pan paniscus} through fence. Bonobo showing trust by extending hands for 'finger biting'. Lola Ya Bonobo Sanctuary, Kinshasa, DR of Congo, 2007

Scott Leslie / Wood Duck (Aix sponsa) male in trap, Belleisle Marsh, Annapolis Valley, Nova Scotia, Canada

Juan Manuel Borrero / European chameleon (Chamaeleo chamaeleon) on top of his cage in Marrakech, Morocco. Captive December 2007

Juan Manuel Borrero / European chameleon (Chamaeleo chamaeleon) on top of his cage in Marrakech, Morocco. Captive December 2007

Anup Shah / Slender mongoose {Herpestes sanguineus} standing guard next to carcass of mammal kill, Masai Mara GR, Kenya

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) hanging upside down feeding on hawthorn leaves, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) at nest hole in tree, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) five perched, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on Tinder fungus (probably taking a mineral supplement) Richmond Park, London, UK, naturalised british population from cage birds that escaped into th...

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on Hawthorn berries, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on Hawthorn berries, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on horse chestnut conker, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on Hawthorn berries, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) feeding on Tinder fungus (probably taking a mineral supplement), Richmond Park, London, UK, naturalised british population from cage birds that escaped into t...

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeets (Psittacula krameri) Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.