how to move a "planted" feather duster

[supermarvin76]

I would like to re-aquscape my tank, but I have several great large feather dusters. These seem to have their "foot" stuck very well into rock crevasses. How do I go about moving them safely?
Thanks for the help!!!

 

[quarryshark]

I wouldn't try it unless they let go VERY easily. May injure them.