Some Help to ID this Duck

It's the time of year when we get a lot of migratory birds through Oklahoma. Today I saw three of these at a local lake. I've been trying to ID them without success. It may be a hybrid of some type or even a domestic duck given how totally unconcerned they were with my presence. Anybody recognize them?

Canon EOS 7D Mark II • 1/1600 • f/5.6 • ISO 640

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Canon 7d MkII, Canon 50D, Pentax 67, Canon 30D, Baker Custom 4x5, Canon EF 24-104mm f4, Canon EF 100mm f2.8 Macro, Canon EF-S 10-22mm f/3.5-4.5, 70-300mm f/4-5.6 Di VC

The Singular ImageRichard Smith Photography
Richard Smith Real Estate Photography500PXFine Art America

- Eric S.: My Birds/Wildlife (R5, RF 800 f/11, Canon 16-35 F/4 MkII, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

Rog
Gear:7Dll 7D 40D 24-105 4L, 70-200 4L, 300 4L IS, 85 1.8, 1.4 TC, Tamron18-270VC, Sigma 150-600 OS 430EX II

Rog
Gear:7Dll 7D 40D 24-105 4L, 70-200 4L, 300 4L IS, 85 1.8, 1.4 TC, Tamron18-270VC, Sigma 150-600 OS 430EX II

Canon 7d MkII, Canon 50D, Pentax 67, Canon 30D, Baker Custom 4x5, Canon EF 24-104mm f4, Canon EF 100mm f2.8 Macro, Canon EF-S 10-22mm f/3.5-4.5, 70-300mm f/4-5.6 Di VC

The Singular ImageRichard Smith Photography
Richard Smith Real Estate Photography500PXFine Art America

Zach--C&C is welcome on my photos
https://www.flickr.com​/photos/46367607@N06/
7DI Body Gripped|7DII Gripped|EF 85mm1.8|EF 50mm1.4|EF 100mm2.8L IS Macro|EF-S 10-22mm|EF 400mm5.6L|430EXII|580E​XII