I was thinking wood thrush when I first saw it. My bird book says wood thrushes are summer birds in my area (southeast Georgia), so then I thought maybe a hermit thrush? Its tail is a redish brown color. I am not very good at this lol, but at least its fun!

Someone has since said that they think it could be a Winter Goldfinch (and when I googled images...yes, that looks pretty darn close to what I think I saw!)

Okay, they're back and in better light. Mystery solved, I'm being visited by a lovely pair of Lazuli Buntings, oh my gosh!! This is a first in my yard since I've lived here. Thanks all for trying to help me. I got a very clear look at these birds today, and saw that the blue extended across the back, and the head was even bluer than I had realized. I thought at first it might be a Western Bluebird, but it wasn't big enough. Such a pretty little bird and so glad to see it at my feeders!!

Sorry, the image I tried to upload was too big, I changed it to 72 dpi and now it's too small. Our friend already emailed us back that it's a song sparrow.