I have strange lines in my soil, mainly after a light rain. I want to say "worm tracks". It looks like something was dragging it's tail, but I dont see foot prints. Another thing that seems strange is, I see these in the morning and they look much fresher, but it seems much too cold for an insect to out at night.
Any Idea what I am seeing?
P.S. That is a 3" deck screw in the picture.