Identificaciones de shxx60

I'm not sure if the darker coloration on the nape is a red marking or an illusion of one caused by shadows and reflected light. In the field the nape looked like it had no markings, but even with binoculars, my eyesight isn't the best. I have seen both intergrade and (presumed) pure red-shafted flickers at this location before.

TL;DR please don't identify this bird beyond species level

I believe the horizontal white line is within normal expectations for American GWT, but maybe it's an AmericanxEurasian hybrid (not particularly rare, which is one of the arguments against splitting the two into separate species). Here is a post by David Sibley on GWT identification: https://www.sibleyguides.com/2011/03/distinguishing-green-winged-and-common-teal/

TL;DR please just leave this bird at species level, rather than subspecies