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 / 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

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

Luiz Claudio Marigo / Handful of baby Spectacled caiman {Caiman crocodilus} Amazonas, Brazil

Luiz Claudio Marigo / Spectacled caiman beside river {Caiman crocodilus} Llanos, Venezuela

Luiz Claudio Marigo / Spectacled caiman beside river {Caiman crocodilus} Llanos, Venezuela

Luiz Claudio Marigo / Spectacled caiman beside river {Caiman crocodilus} Llanos, Venezuela

Luiz Claudio Marigo / Handful of baby Spectacled caiman {Caiman crocodilus} Amazonas, Brazil

Pete Oxford / Spectacled caiman {Caiman crocodylus} Amazonia, Ecuador

Pete Oxford / Spectacled Caiman (Caiman crocodilus) feeding on prey, Pantanal, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus) juvenile in swamp, Pantanal, Mato Grosso do Sul, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus) feeding on prey, Pantanal, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus) in flooded forest, Pantanal, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus) in swamp, Pantanal, Brazil

Pete Oxford / Spectacled Caiman (Caiman crocodilus) feeding on prey, Pantanal, Brazil

Konrad Wothe / Spectacled Caiman (Caiman crocodilus) eyes shining at night, Pantanal, Mato Grosso, Brazil

Konrad Wothe / Spectacled Caiman (Caiman crocodilus) with face barely above waterline, Pantanal, Brazil

Konrad Wothe / Spectacled Caiman (Caiman crocodilus) panting to thermoregulate, Pantanal, Brazil

Konrad Wothe / Spectacled Caiman (Caiman crocodilus) resting on grass, portrait, side-view, Pantanal, Brazil

Pete Oxford / Young Spectacled caiman {Caiman crocodilus} Piaui State, NE Brazil

RICHARD KIRBY / Concentration of spectacled caiman due to retreating water in dry season, Venezuelan Llanos

Daniel Gomez / Spectacled caimans {Caiman crocodilus} cooling down at midday, Pantanal, Brazil, South America

Philippe Clement / Common snowdrops (Galanthus nivalis) in flower, Belgium, February.

Ashley Cooper / Beech tree (Fagus) leaves blowing in the wind with cars driving past in background, Clappersgate, Lake District, UK.

Christophe Courteau / Studio timelapse of Common poppy (Papaver rhoeas) flower stem and bud moving, straightening up, France.