Great Shots, gifthorse.
On shooting through windows, clean windows are a plus and double pane windows are best. Before I got my double pane windows I had to deal with reflections when trying to shoot through them. It was annoying to say the least. I had to angle a certain way to keep the reflections down.
After it got warm outside though, and the birds got used to me, I could almost walk up to them before they flew away. Course, I never seemed to have my camera with me then. I was going out to fill the feeders.