Thanks, great bird, for standing still!

On New Years' Eve, I was walking along a snowy trail, having seen few other creatures larger than chickadees, when I was startled to see this heron perched on a bridge.  It didn't seem fazed at all by my approach, and I'm sure that I found it more interesting for the next several minutes than it found me. (To me, it was a rare chance for a close-up portrait; to it, I must not have appeared relevant in either the food or threat category.) When a couple of other humans arrived nearby, this may have been too much, too close, and then it flew.