Edwin Giesbers / Saltwater crocodile (Crocodylus porosus) close up portrait, Sarawak, Borneo, Malaysia

Anup Shah / Nile crocodile holding newly hatched young in mouth {Crocodylus niloticus} Kenya

Michael Pitts / Saltwater crocodile underwater {Crocodylus porosus} Kakadu NP, NT, Australia

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) catching a Little red flying fox (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) trying to catch Little red flying foxes (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Ingo Arndt / Close up of foot of Australian freshwater crocodile {Crocodylus johnsoni}

Pete Oxford / American Crocodile (Crocodylus acutus) nest excavated by nesting female Green Iguana (Iguana iguana), Banco Chinchorro, Yucatan Peninsula, Mexico

Denis-Huot / Starving group of Nile crocodiles (Crocodylus niloticus) feeding on Zebra, Masai-Mara game reserve, Kenya.

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