[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This Muscovy Duck was photographed at a wetland area at Exit 32N of Route 77/69, Harlingen, Texas. Photo taken with a AF-S VR Nikkor 200-500mm f/5.6 IF-ED lens on a Nikon D7100 camera. (Date: January 31, 2022)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This feral Muscovy Duck was photographed at Resaca Boulevard, Brownsville, Texas, USA. Photo taken with a Nikkor 70-200mm EDAF-S VR f2.8 lens + Nikkor TC14E II 1.4x Teleconverter (EFL=420mm) on a Nikon D200 camera. (Date: May 24, 2007)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This Muscovy Duck was photographed at a wetland area at Exit 32N of Route 77/69, Harlingen, 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: January 31, 2022)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This Muscovy Duck was photographed at a wetland area at Exit 32N of Route 77/69, Harlingen, 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: January 31, 2022)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This Muscovy Duck was photographed at a wetland area at Exit 32N of Route 77/69, Harlingen, Texas. Photo taken with a AF-S VR Nikkor 200-500mm f/5.6 IF-ED lens on a Nikon D7100 camera. (Date: January 31, 2022)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This Muscovy Duck was photographed at a wetland area at Exit 32N of Route 77/69, Harlingen, Texas. Photo taken with a AF-S VR Nikkor 200-500mm f/5.6 IF-ED lens on a Nikon D7100 camera. (Date: January 31, 2022)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

Although this Muscovy Duck shows all the field marks of a wild bird, it is assumed to be a feral bird descended from domestic stock. It was photographed at a road crossing on the Guadalupe River along Rt. 1340, Hunt, Texas, USA. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: December 2000)

[Length 25 (Female) to 31 (Male) in. Wingspan 38 (F) to 48 (M) in.]

This feral Muscovy Duck, presumably descended from domestic stock, has reverted almost completely to the plumage of its wild ancestors. It was photographed at Fort Clark Springs, Texas, USA. Photo taken with a Nikkor 300mm EDAF f4 lens on Kodachrome 200 film. (Date: April 2000)

[Length 17 in. Wingspan 25 in.]

The Ring-necked Duck gets its name from the chestnut collar which appears briefly on the drake's neck during the breeding season. This is a classic example of a bird being named for a field mark that was seen on a specimen "in the hand". Although it can be seen faintly here, it is more often not visible "in the field". This drake Ring-necked Duck was photographed along the entrance road to Land of the Loons Resort, Anglin Lake, Saskatchewan, Canada. Photo taken with a AF-S VR Zoom Nikkor 200-500mm f5.6 IF-ED lens on a Nikon D7100 camera. (Date: June 21, 2018)