Yes, those are from the Chicago area. The top picture is from Montrose Harbor, the second from the Chicago Botanic Gardens. The males are all over the place. Several dozens in each location. You can hear their calls everywhere (wikipedia has a soundfile: http://en.wikipedia.org/wiki/Red-winged_blackbird). Haven’t seen any females yet.

Re: Wallace Stevens, yes, he was from Connecticut. But my reading of the poem is that “blackbird” is an idea for him — he took a word that has few connotations other than common, simple, self-contained and -defining, and he placed that word/object in different situations. I think the result highlights the situations and the images they describe. Though it is fun to imagine one of these red-winged blackbirds in some northern mountain range, motionless but for one roaming eye.