While preparing for my Boston trip, a quick glance out the window sent me scrambling for the camera. The 100-400 mm was already in place so just a quick ISO check was needed. I grabbed a series of shots through the slider before opening for a cleaner image. The bird didn't move!
I am leaving the identification open to those with experience. This post will provide some history and reference on an earlier raptor ID by Gretchen.
Later... I'm thinking maybe Red-Tailed?
I visited the Arden Gallery on Boston's Newbury Street to view the egg tempera paintings of Koo Schadler. Jaw dropping good, it was. I mean, awesome. Lots of red dots too. Also on exhibit was the egg tempera work of husband and wife team Scherer and Ouporov.
If that wasn't enough, there was also an unadvertised exhibit of the exquisite egg tempera and gold leaf work of Fred Wessel. I remember his "Giana" and "Anticipating Bacchus". His brushwork is fascinating. Minute strokes of many colors, following form, that is not apparent in the photos. The lighting was so, so fine that I really don't have words for it. I actually felt the glow coming off the panel.