Bence Mate / Jacare / Yacare caiman (Caiman crocodilus yacare) two caymans, one with mouth open, Pantanal, Brazil.

Bence Mate / Head portrait of young Spectacled caiman (Caiman crocodilus) with mouth open, and plant sapling, Santa Rita, Costa Rica

Bence Mate / Head portrait of young Spectacled caiman (Caiman crocodilus) with jaw closed, Santa Rita, Costa Rica

Bence Mate / Head portrait of young Spectacled caiman (Caiman crocodilus) partially submerged in water, with reflection, Santa Rita, Costa Rica

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

Mark MacEwen / Broad snouted caiman (Caiman latirostris) hatching from egg in nest, Sante Fe, Argentina, February

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

Steven David Miller / Australian freshwater / Johnstone's crocodile (Crocodylus johnsoni) with fish in mouth, a scrap from a fisherman, Lake Kununurra, Western Australia, July

Steven David Miller / Australian freshwater / Johnstone's crocodile (Crocodylus johnsoni) with damaged upper jaw in shallow water waiting for a scrap from a fisherman, Lake Kununurra, Western Australia, July

Roland Seitre / American Crocodile (Crocodylus acutus) seen on 'The Crocodile Man Tour'. Carara National Park, Tarcoles, Costa Rica, August 2008.

Pete Oxford / American alligator (Alligator mississippiensis) half submerged, Okefenokee National Wildlife Refuge, Florida, USA

Konrad Wothe / Estuarine / Saltwater crocodile (Crocodylus porosus) amongst mangrove roots, Daintree National Park, Queensland, Australia, October