I have just watched some thing down inside the hole making a deposit at the outside. I am pretty sure now that it wasn’t a worm because at one point the creature came out far
enough that I could see little appendages and I don’t think worms have appendages at their worm casting deposition end!
No idea what creature is doing it but it’s not a worm. Maybe it is an ecological analog. Is that a term? Some creature who does the same job as a worm but isn’t a worm is what I am trying to say