Cold Feet?

I have sat still in front of my computer virtually all day. I am sure it is not good for you. However I feel I have made good progress with the piece of work I was doing. This grey heron too seemed to be sitting still for a long time but his work was a little different to mine - the hunt for fish to give warmth and sustenance, and all the time with his feet in cold water. Suddenly, sitting in front of the computer all day in a warm room with food to hand doesn't seem so bad!