Blue-winged Teal
I am a novice compared to most of you guys but I have a very good friend, an ornithologist of some experience living near Chicago. I sent my photos to him plus a link to Vern's Flicker flight photo.
This is his reply:
"I can eliminate Cinnamon Teal by the facial pattern and the rather pale blue wing (with would be much duller in CITE). This leaves really only Blue-winged Teal, a female type bird or a young male bird based on the little orange left in the gape in the flight shot. I don't think this is a hybrid. Blue-winged teals have almost shoveler-like bills. But then, I haven't seen a hybrid of the two species, so I wouldn't know what they look like. This bird, to my eye, looks within the span for this species."
Interesting comments from someone who sees BWTs on a regular basis.
Hope this contribution helps in some way.