blissedout said:

A pellet gun will be your best bet, unfortunately. The owls only work to keep the birds from roosting on your roof/eaves. I had a mocking bird outside my window some years ago and the fucker would start up every night around 2am, which is usually the time that I am just laying down for sleep. In a fit of drunken rage one night, I went out and started throwing whatever I could find into the tree that it lived in. I threw a golf club, rocks, crushed cans, and I even attempted to climb the tree to rip it's nest out. It didn't work. The bastard still didn't leave. It eventually moved on, but not before testing my sanity and resolve to kill it.

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