I've got two that look just like this, but I can't seem to find a breed online that looks quite like it. Is it a mix?
I will guess Cayuga Swedish mix.
It's a beautiful mix.
Very nice markings! He is quite a cutie.
It isn't even close to a Duclair.
I don't get it. Some people see a BEEAUUTIFUL bird in every mongrel photo that is ever posted. I see a cull that isn't worth the cost to feed it. It will never be a high production layer, it will never produce efficient meat birds, it will never be a show winner. To answer the original question, it is simply a mongrel duck that has no intrinsic value.