Photo taken by friend, unsure of precise habitat
No interactions present.
Is the tail a bit short for a CG?
I’m not hugely knowledgeable about N American birds but I understand the range of BB has been extended to cover the great lakes region recently.
Fair comment! Tail length is what bothered me most for grackle, but the bill looks very heavy and stout for Brewer's B.
Suspect without more of a profile it's best left 'probable' in any case...!
Flickr pics: http://www.flickr.com/photos/72243477@N00/
Lat/Lng: 45, -91
Photo taken by friend, unsure of precise location, but in Wisconsin USA