Ron Bielefeld/ BIA / Black-bellied Whistling Duck (Dendrocygna autumnalis) flying, Florida

Ron Bielefeld / Black-bellied Whistling Duck (Dendrocygna autumnalis) flying, Florida

Rolf Nussbaumer / Pair of Black belled whistling ducks {Dendrocygna autumnalis} Texas, USA

Rod Williams / Two Black-billed / West Indian whistling duck {Dendrocygna arborea} Cuba. Captive

Rod Williams / Black-billed / West Indian whistling duck {Dendrocygna arborea}, Cuba. Captive

Pete Oxford / Plumed whistling duck {Dendocygna eytoni} stretching leg, Australia.

Pete Oxford / Two White faced whistling ducks {Dendrocygna viduata}, Madagascar.

Rolf Nussbaumer / Rio Grande Valley sunset with silhouette of Black bellied whistling duck, Texas, USA.

Rolf Nussbaumer / Black belled whistling ducks in flight {Dendrocygna autumnalis} Texas, USA.

Thomas Marent / Black-bellied Whistling Duck (Dendrocygna autumnalis), Rio Claro Nature Reserve, Colombia

Steven David Miller / Plumed whistling-duck (Dendrocygna eytoni), three walking in a row. Mackay, Queensland, Australia.

Murray Cooper / Black-bellied Whistling Duck (Dendrocygna autumnalis) and White-faced Whistling-Duck (Dendrocygna viduata) flock in wetland, Colombia