David Pattyn / Spectacled caiman (Caiman crocodilus) portrait with head just on water surface, Pantanal, Brazil

David Pattyn / Spectacled caiman (Caiman yacare) walking on a sandy shore at the edge of a river at night, Pantanal, Brazil

Michel Roggo / Spectacled caiman (Caiman crocodylus) at water surface. Beni, Bolivia, October.

Edwin Giesbers / Spectacled Caiman {Caiman crocodilus} head above water, Costa Rica

Peter Scoones / Spectacled caiman underwater reflections (Caiman crocodilus) Pantanal, Brazil photographed during making of BBC Planet Earth series 2005

Luiz Claudio Marigo / Spectacled caiman {Caiman crocodilus} with Butterfly {Dryadula phaetusa}

Konrad Wothe / Spectacled Caiman (Caiman crocodilus) with orange butterfly perched on tip of snout, Pantanal, Mato Grosso, Brazil

Hans Christoph Kappel / Spectacled Caiman in water, Pantanal, Brazil

Pete Oxford / Spectacled caiman juvenile on giant lily pad {Caiman crocodilus}, Iwokrama Reserve, Guyana South America

David Pattyn / Black vulture (Coragyps atratus) scavenging a dead Spectacled Caiman (Caiman crocodilus) floating in the Rio Cuiaba, Pantanal, Mato Grosso, Brazil.

David Pattyn / Spectacled caiman (Caiman crocodilus) frontal portrait, Pantanal, Brazil

David Pattyn / Spectacled caiman (Caiman crocodilus) baby swimming in the water of an oxbow lake, Pantanal, Brazil

David Pattyn / Spectacled caiman (Caiman crocodilus) group of babies swimming together in the water of an oxbow lake, Pantanal, Brazil

David Pattyn / Spectacled caiman (Caiman crocodilus) young animal at water surface, Pantantal, Brazil

Mark MacEwen / Spectacled Caiman eye (Caiman crocodilus) juvenile in Hato el Cedral, Los Llanos Apure State in Venezuela.

Mark MacEwen / Spectacled Caiman (Caiman crocodilus) juvenile in pool in Hato el Cedral, Los Llanos Apure State in Venezuela.

Mark MacEwen / Spectacled Caiman (Caiman crocodilus) juvenile being filmed with an innovision scope, in Hato el Cedral, Los Llanos Apure State in Venezuela.

Mark MacEwen / Spectacled Caiman (Caiman crocodilus) dead on dry lake bed on wetlands which dry up every year, Hato el Cedral, Los Llanos Apure State in Venezuela.

Mark MacEwen / Spectacled Caimans (Caiman crocodilus) at a Caiman farm, Venezuela.

Mark MacEwen / Spectacled Caimans (Caiman crocodilus) at a Caiman farm, Venezuela.

Mark MacEwen / Spectacled Caimans (Caiman crocodilus) at a Caiman farm, Venezuela.

Mark Carwardine / Stephen Fry with Spectacled caiman at night, filming BBC TV series 'Last Chance to See' in the Brazilian Amazon, Jan 2008

Mark Carwardine / Spectacled caiman {Caiman crocodilus} young held in hand, mouth wide open, Rio Negro, near Manaus, Brazil, Amazonia

Christophe Courteau / Spectacled Caiman / Jacare on river bank (Caiman crocodilus) Pantanal, Brazil.

Christophe Courteau / Spectacled Caiman / Jacare in shallows (Caiman crocodilus) Pantanal, Brazil.

Christophe Courteau / Scales on tail of Spectacled Caiman / Jacare in water (Caiman crocodilus) Pantanal, Brazil.

Christophe Courteau / Spectacled Caiman / Jacare (Caiman crocodilus) 'panting' to cool down on river bank. Pantanal, Brazil.

John Cancalosi / Spectacled Caiman (Caiman crocodilus) eye above water surface. Costa Rican tropical rainforest.

Nature Production / Spectacled Caiman (Caiman crocodilus) eyes and nose just above water, captive, Tobu Zoo, Saitama, Japan

Daniel Heuclin / Spectacled Caiman (Caiman crocodilus) eating fish prey in wetland habitat. Controlled conditions. French Guyana, August.

Daniel Heuclin / Spectacled Caiman (Caiman crocodilus) in water with its eyes and nostrils protruding above water-level. Controlled conditions. French Guyana, August.

Daniel Heuclin / Spectacled Caiman (Caiman crocodilus) eating fish prey. Controlled conditions. French Guyana, August.

Daniel Heuclin / Spectacled Caiman (Caiman crocodilus) in wetland habitat. Controlled conditions. French Guyana, August.

Daniel Heuclin / Spectacled Caiman (Caiman crocodilus) in wetland and forest habitat. Controlled conditions. French Guyana, August.

Jenny E. Ross / Head portrait of an adult spectacled Caiman (Caiman crocodilus) partically submerged in water. The Pantanal, Mato Grosso du Sul, Brazil. September

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) group resting on sandbanks, Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus), Pantanal, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus) in Water Lettuce (Pistia stratiotes), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus) in Water Lettuce (Pistia stratiotes), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus) feeding on Capybara (Hydrochoerus hydrochaeris), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Spectacled Caiman (Caiman crocodilus) on road, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) on road, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) on road, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) dead on road, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) with fish prey, Rewa River, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) on riverbank, Rewa River, Guyana

Pete Oxford / Spectacled Caiman (Caiman crocodilus) at night, Rewa River, Guyana

Michel Roggo / Spectacled caiman (Caiman crocodylus) with Piranha in mouth. Pantanal, Mato Grosso, Brazil.

Luiz Claudio Marigo / Young boy with several dead Spectacled Caiman (Caiman crocodilus) caught on a fishing hook, Itapuru community, Amazon Rainforest, in Piagacu-Purus Sustainable Development Reserve, Amazonas State, Nor...

Luiz Claudio Marigo / Hunter with eight dead Spectacled Caiman (Caiman crocodilus) in his canoe and a Black Caiman (Melanosuchus niger) in his hands. Piagacu-Purus Sustainable Development Reserve, Amazonas State, Northern...

Luiz Claudio Marigo / Woman rubbing salt into fillets of Caiman meat (Caiman crocodilus) on floating house in Amazon Rainforest, in Piagacu-Purus Sustainable Development Reserve, Amazonas State, Northern Brazil.

Mark Bowler / Spectacled Caiman {Caiman crocodilus} on river bank, Rio Yanayacu, Pacaya-Samiria National Park, Peru

Mark Bowler / Spectacled Caiman {Caiman crocodilus} on river bank, Rio Yanayacu, Pacaya-Samiria National Park, Peru

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus), Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus), Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus), Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) eating fish, Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) on shore, Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) floating in water, Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus), Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) on shore, Pantanal, Brazil

Suzi Eszterhas / Spectacled Caiman (Caiman crocodilus) on shore, Pantanal, Brazil

Michael Hutchinson / Spectacled caiman (Caiman crocodilus) in marsh habitat, Esteros del Ibera, Argentina

Michael Hutchinson / Spectacled caiman (Caiman crocodilus) with mouth open, Esteros del Ibera, Argentina

Michael Hutchinson / Spectacled caiman (Caiman crocodilus) with mouth wide open, Esteros del Ibera, Argentina

Michael Hutchinson / Spectacled caiman (Caiman crocodilus) on marshes, Esteros del Ibera, Argentina

Martin van Lokven / Spectacled Caiman (Caiman crocodilus) eye, Tortuguero National Park, Costa Rica

Martin van Lokven / Spectacled Caiman (Caiman crocodilus), Tortuguero National Park, Costa Rica

Fabio Liverani / Spectacled caiman {Caiman crododilus} in River Tambopata at night, Tambopata National Reserve, Amazonia, Peru

Fabio Liverani / Spectacled caiman {Caiman crododilus} on banks of River Tambopata at night, Tambopata National Reserve, Amazonia, Peru

Edwin Giesbers / Spectacled Caiman (Caiman crocodilus), with part of its head above water, Costa Rica

Edwin Giesbers / Spectacled Caiman (Caiman crocodilus) in shallow water, Costa Rica

Edwin Giesbers / Spectacled caiman {Caiman crocodilus} on forest floor, Costa Rica

Thomas Marent / Spectacled Caiman (Caiman crocodilus) with water plant on snout, Venezuela

Nick Gordon / Spectacled caiman {Caiman crocodilus} on log reflected in water in rainforest, Amazonia, Brazil

Philippe Clement / Spectacled caiman (Caiman crocodilus) with fish, Carara NP, Costa Rica

Philippe Clement / Spectacled caiman (Caiman crocodilus) resting on log in river, Carara NP, Costa Rica

Mary McDonald / Spectacled caiman {Caiman crocodilus} captive, from South America

Mary McDonald / Spectacled caiman {Caiman crocodilus} captive, from South America

Peter Scoones / Spectacled caiman underwater reflection (Caiman crocodilus) Pantanal, Brazil photographed during making of BBC Planet Earth series 2005

Peter Scoones / Spectacled caiman underwater (Caiman crocodilus) Pantanal, Brazil photographed during making of BBC Planet Earth series 2005

Peter Scoones / Spectacled caiman underwater reflection (Caiman crocodilus) Pantanal, Brazil photographed during making of BBC Planet Earth series 2005

RICHARD KIRBY / Spectacled caiman (Caiman crocodilus) gathered in large numbers in river in dry season, Venezuela, South America

Hermann Brehm / Spectacled caiman (Caiman crocodilus) with piranha fish prey, Llanos del Orinoco, Venezuela

RICHARD KIRBY / Spectacled caiman on river bank (Caiman crocodilus) Venezuela, South America

RICHARD KIRBY / Semi submerged Spectacled caiman (Caiman crocodilus) Venezuela Llanos, South America

Pete Oxford / Spectacled caiman (Caiman crocodilus) grouped together at water surface at dusk, in dry season, Yacare, Brazil

Hans Christoph Kappel / Spectacled Caiman (Caiman crocodilus) with eyes just visible above water level, Pantanal wetlands, Brazil

Luiz Claudio Marigo / Spectacled caiman {Caiman crocodilus} with Butterfly {Dryadula phaetusa} sucking

Luiz Claudio Marigo / Spectacled caiman with mouth full of raw meat {Caiman crocodilus} Llanos, Venezuela