I was thinking of using a BB gun or CB, caps as a deterrent, and only aim them at the Pigeons. The CB cap would probably be illegal since it is a bullet shot out of a firearm, but the BB gun may do the trick. Now if only I could find where I stashed mine some years back! Bye the way, I am not looking to kill them, just to pump it once and give them a ping in the butt, so to speak. That should scare them away if done each time they show up while I am on guard duty. Of course, I may just let them stay around until they either poop on the laundry or start living on my house, which would not be a good thing. Just imagine leaving for work and having a Pigeon take off from your roof and drop one on your head. Yech...
Oh well, there must be a humane solution to get rid of these nuisance animals, but if not I''ll find something that works that is at least legal.
All the best,