My feather duster is building a new tube

[hllb]

Did I do something wrong with him? He seems to be tunneling under my mushrooms and building a new home. Why might he do this? Should I take the old tube out now?

This hole is his new home:

And here he is enjoying it:

 

[Bret Brinkmann]

Sometimes they move. I've had several do this. They always make it unless something eats them before they get to their new spot. Usually they prefer the current in the new spot more because that is what brings the food in.

You can take out the tube or leave it in. It won't hurt anything.