I photographed this bird on May 7th this year just north of Rainy River Ontario in extreme southwest Northwestern Ontario, just north of Baudette MN. An astute birder friend said his first impression was that of a Shiny Cowbird, but he dismissed that as being to weird, as they are a South American species which has just made it into south Florida with a few other spot sightings in the SE US. Others have opined that it is a female Brewer's Blackbird, which it may well be, what with the dark eye and all. But no one seems to recall having seen a female Brewer's with the inky, blue-black color of a male Brewer's; they should be of a more gray-brown hue.
Interesting one you've got here, Al. Beak looks too thin for any of the Cowbirds, to me. I would hazard that you've got a juvenile, male Brewer's here and it's eyes just haven't changed yet.