Probably this^^^^^^^ they call them Summer Ducks.It seems way to late in the year for it, but I would have to say that is just an immature drake.
possibility of it being an XXY duck? basically a hermaphrodite... the amount of white feathering that is around that eye, and the solid yellow eyelid, is not like an eclipse drake... it's plumage of a hen, while obviously other indicators show plumage of a drake. maybe biologically it's both?
The first year drakes have a yellow eyed lid and the white feathers around it until they start to plume out. The eye also starts out brow and turn red as it develops. Like I said earlier, it seems late to still have that plumage, but the white feathers and yellow eyelids are absolutely found on young drakes before and during their first molt. I've never seen it on a older "eclipse" drake. Here is one picture of many you can find on the internet.
http://www.alamy.com/stock-photo-no...k-aix-sponsa-in-eclipse-plumage-82175794.html
Still saying, there’s a discernible difference between drake eclipse (young or not) and what this duck is
Eclipse drake:
Meanwhile, intersex wood ducks/hermaphroditism/extra X chromosome
Looks an awful lot like the one poster shot...