Anyways, I picked it up just outside my office building on Friday.
It hadn't been dead for long; rigour had set in, but its black eyes were still clear. I put it in my coat pocket, then transferred it to a small paper bag (I have many---I eat too many muffins on the way to and at work), and to a freezer bag and into the freezer when I got home. The Fatal Light Awareness Program (FLAP) is staffed by volunteers (I think) and works with office managers to turn out lights at night to keep migrating birds from crashing into high-rise windows. People trek to high-rise buildings before dawn and pick up and record fatalities and injured birds, and work to get the live ones rehabbed and back to their routes. And there's a collision reporting page in case you do find a dead or injured bird: http://www.flap.org/new/colrepfr.htm
UPDATE: It's a Fox Sparrow. I got a clue from my Petersen's guide and googled for a live image.
UPDATE October 29: I'm being a good honest blogger and removing the photo of the Fox Sparrow. The photographer has copyrighted all his images and I didn't ask permission to use that one.
You can see Doug Backlund's beautiful photos here: http://www.wildphotosphotography.com/WildPhotos/birds2/fox_sparrow2.htm