From my backyard setup today, 10 degrees F! Bird feeder/Ameristep Hide. Canon 40D, 300mm 2.8L + 1.4TC, tripod. 1/400 sec., f/6.3, iso 400, +2/3 EC, no flash. Usual photoshop processing, nothing cloned out or added. NR on BG.
Beautiful soft light, sharp, well exposed. Very complimentary background.
I might consider a slight change in crop to get the bird off the horizontal midline, and perhaps clone out the small bit of flower reaching towards the neck.
Very nice shot. I like the color scheme. Sometimes winter coats are beautiful in their subtleness. I agree about the crop. Maybe if the bird were a little lower horizontally.