[Length 21 in. Wingspan 30 in.]

This pair of Black-bellied Whistling-Ducks was photographed at a nestbox near Rosenberg, Texas, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: May 2000)

[Length 21 in. Wingspan 30 in.]

This immature Black-bellied Whistling-Duck was photographed at Estero Llano Grande State Park, Texas, USA. Photo taken with a Nikkor 300mm EDAF-S VR f2.8 lens (EFL=450mm) on a Nikon D200 camera. (Date: August 7, 2006)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck was photographed at Estero Llano Grande State Park, Texas, USA. Photo taken with a Nikkor 300mm EDAF-S VR f2.8 lens + Nikkor TC14E II 1.4x Teleconverter (EFL=630mm) on a Nikon D200 camera. (Date: August 7, 2006)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck was photographed at the Gladys Porter Zoo, Brownsville, Texas, USA. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=345mm) on a Nikon D200 camera. (Date: November 23, 2009)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck was photographed at the SPI Convention Center gardens, South Padre Island, Texas, USA. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens (EFL=450mm) on a Nikon D300 camera. (Date: April 13, 2010)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck was photographed at Sabal Palms Sanctuary, Brownsville, Texas, USA. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=450mm) on a Nikon D300 camera. (Date: June 14, 2011)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck in flight was photographed at the Convention Center gardens, South Padre Island, Texas, USA. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: May 3, 2013)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling Duck in flight was photographed at the SPI Convention Center boardwalk, South Padre Island, Texas, USA. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: August 22, 2013)

[Length 21 in. Wingspan 30 in.]

This Black-bellied Whistling-Duck was photographed at the SPI Convention Center gardens, South Padre Island, Texas. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: May 07, 2018)