I still think a sling shot loaded with dried kidney beans will sting but not kill. Can't see the Owl sticking around after a good peppering like that.
“Unless and except as permitted by regulations This makes it sound as if there is some legal way to move it. Have you called any local college...
Two things
#! get a wrist rocket sling shot and shoot at it with dried beans or plastic marbles ( non lethal but it will sting.)
#2 See if they still sell bird bombs for shotguns. It shoots out a loud explosive charge(again non lethal)
Hope you can find an end to this. Ask the dept of...