Good shooting.
If I may, allow me to make a suggestion. Two things. Make sure you have a lot of food down for all the birds. I broadcast sunflower seed in my kill zone to bring in doves (who are fearless) and I think this both brings greedy starlings in (sense of urgency) AND serves to distract them enough to allow me to crack a window. There's always a lot going on down there, with smaller birds heading to the feeders, junco's running in and out of the kill zone, and clouds of Doves descending into and around the kill zone.
In cold weather, you're only going to make lots of bird friends anyway, but with the added distractions, you might well get a couple more shots off.