I’m not very good with bird identification, but I believe this is a Blue Heron.  I found him sitting near a snow-covered, frozen pond in Unicoi, Tennessee.  When I got within 20 yards or so he took off, not leaving me much time to adjust camera settings.  If I had been prepared, I would have increased the ISO in order to have an even quicker shutter speed.  I may try to find this little guy again tomorrow, and give it another try.

Photo details: Nikon D80, Nikon 18-200mmVR lens @ 200mm, f/5.6, 1/400 sec. shutter, 100 ISO.  I also increased the contrast in post-processing.