Hi AVB,
Brick is safe now it is bolted on. We had some very strong winds a couple of days ago and I thought the owl was going to loose its head but it hung in there even though it was spinning hard back and forth, not knowing which way to go. I'm thinking of fitting a solar motion detector light on the brick so that when the owl moves or its head wobbles the light will shine on the owl. That should give the possums something to be concerned about