One change which has always brought me some enjoyment is the rabbit changing to white. As a child there were often hundreds of jack rabbits (whitehttp://talkaboutwildlife.com/)where I lived, and their change in color was a highlight for a small child. It marked a very definite change in the seasons. It indicated that any time now, it could become very cold for prolonged periods of time and snow usually began to stay.
This week when I was delivering papers, I found a rabbit under a shrub just in front of a subscriber's door. I was less than a meter away from the rabbit and it did not flush. So I thought I'd have a little chat with the old boy. Still, he (or she) did not move. I put the paper in the mail box and left. This particular rabbit was just about all white. We don't have any snow cover yet, but he was still hard to see. In a few more days this particular animal will be completely white.
Once again, one of my favorite fall changes has given me its pleasure.