Christophe Courteau / Cocoi / White-necked heron (Ardea cocoi) flying over river, Pantanal, Brazil, July

Pete Oxford / White-necked Heron (Ardea cocoi), Rupununi, Guyana

Murray Cooper / White-necked Heron (Ardea cocoi) in wetland, Colombia

Suzi Eszterhas / White-necked Heron (Ardea cocoi), Cuiaba River, Pantanal, Brazil

Suzi Eszterhas / White-necked Heron (Ardea cocoi) walking, Cuiaba River, Pantanal, Brazil

Suzi Eszterhas / White-necked Heron (Ardea cocoi), Cuiaba River, Pantanal, Brazil

Tim Laman / White necked / Pacific heron (Ardea pacifica) standing on rock by Carnarvon Creek, Carnarvon Gorge, Carnavon National Park, Queensland, Australia

Steven David Miller / White-necked / Pacific heron (Ardea pacifica) on shoreline of the Cooper Creek, Innamincka Regional Reserve, South Australia, June

Luciano Candisani / White-necked Heron (Ardea cocoi) standing in water, Pantanal Ecosystem, Brazil

Luciano Candisani / White-necked Heron (Ardea cocoi) portrait, Pantanal Ecosystem, Brazil

Theo Allofs / White-necked Heron (Ardea cocoi) silhouetted at sunrise, northern Pantanal, Brazil

Konrad Wothe / White-necked Heron (Ardea cocoi), Pantanal, Brazil