Well, when I read that Ann had consulted with the brilliant bird "Norman" and he didn't have a clue. I decided that I must consult the three fabulous "fairies". So, I asked fairies Beatrice, Heidi, and Jane--they have supernatural powers you know. They agreed with me that it must be an Alligator. Therefore, I am sticking with my original guess--an Alligator. It's crawling along.