New Birdwatchers

We've recently moved to the Jackson, TN area and taken up birdwatching by creating a bird garden. We have five types of feed out, including "songbird mix", hummingbird nectar (which is not popular at all, this time of year, but MIL insisted on), finch sock, and a couple of others.

We've attracted a variety of songbirds, including several mated pairs, and identified a falcon of some sort, herons, vultures and red-tailed hawks in the area. There is one bird, all black, slightly iridescent -- not a starling, but similar enough that a starling was mis-identified as being this bird. Can anyone tell us what it is?

Hi Happy, Common Grackle perhaps?

http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Common_Grackle.html

It looks like a grackle, but is much smaller than the specs listed in that link -- more like eight or nine inches from beaktip to tailtip, or about the length of my hand from wrist to fingertip. Also it has a much sweeter song than the sample.

Brown-headed Cowbird?

http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Brown-headed_Cowbird.html