Lucas Bustamante / Anhinga (Anhinga anhinga). Yasuni National Park, Orellana, Ecuador

Bernard Castelein / Darter ( Anhinga melanogaster) drying wings, Keoladeo NP, Bharatpur, India

Neil Aldridge / Portrait of an African darter (Anhinga rufa) on the Chobe River, Chobe National Park, Botswana.

George Sanker / Anhinga (Anhinga anhinga) with large Bluegill Sunfish (Lepomis macrochirus) prey, Everglades National Park, Florida, USA, March.

Ann & Steve Toon / African darter (Anhinga rufa) with fish, Chobe river, Botswana.

Steven David Miller / Australasian darter (Anhinga novaehollandiae) female drying wings after fishing in Corroboree Billabong, Mary River, Northern Territory.

John Shaw / Anhinga (Anhinga anhinga) female catching a large fish on a backwater of the Cuiaba River, Pantanal, Brazil, September.

Bernard Castelein / Darter ( Anhinga melanogaster) drying wings, Keoladeo NP, Bharatpur, India

Bernard Castelein / Darter ( Anhinga melanogaster) drying wings, Keoladeo NP, Bharatpur, India

Robin Chittenden / Oriental darter (Anhinga melanogaster) submerged in water, Sri Lanka.

Andy Rouse / Anhinga (Anhinga anhinga) hunting in water, Pantanal, Brazil

Guy Edwardes / African darter (Anhinga rufa) drying wings whilst perched in tree, Chobe River, Bostwana.