For years we tried all sorts of things to deter unwanted interlopers entering our property. First it was stray cats. They used to get under the house in the middle of the night making loud noises right under where we slept. I used to bang on the floor, go outside in the dark and throw things at them. They still came back. So after some thought I bought an Audi Sub machine gun and loaded it. No not with bullets as it was a battery powered water gun, so loaded it with Cloudy Ammonia. Anyway after a few nights shooting at the cats it fixed the problem. I think the cloudy ammonia soaked into the bases of the house support beams and the ground. Most cats mark their territory with urine so in the dark the cats smelling the cloudy ammonia probrably though a lion had been wandering around.
Years after the property next door had many wild rabbits on it. During The night they used to invade our property and feast on fresh vegetables. The front lawn looked like a golf course with the many holes they had dug. So one day I simply sprayed the border of our property once again with cloudy ammonia. This must have soaked into the grass and ground, as since that day we have never had another rabbit on our property.
Another problem that I fixed up is we had many birds getting into our vegetable and herb garden. Knowing that a birds and some small animals worse nightmare is an Owl I bought a plastic one. However the birds soon woke up that it wasn't real, as it did not move its head.
So with this in mind I scanned a picture of an owls face, making sure it was one with huge yellow eye's (These are the most predatory owls) and frightens even squirrels and other small animals. Then with my laser printer I printed the owls face onto a CD or DVD stick on label. This I affixed to an old CD or DVD disk on the label side. With a diamond drill bored a small hole near the top edge.
As the laser printing of the owls face was in black and white or greyscale colour I then proceeded to paint in the Eye's with the yellow as per the coloured picture of the owl from the original in the bird book.
When it had dried then suspended it with a short length of fishing line just above the vegetables in our garden. The least bit of breeze it spins around first one shiny disk side then suddenly swinging around with the fearsome staring face of the owl.
I asked a friend what she thought. First I displayed the shiny side of the CD disk and just like in Achmed the Dead Terrorist
I asked her, are you afraid? She replied Not really! Then I flipped the disk round to the glaring owl's face and asked her, How about now? She replied "A bit" so if it works on her I thought it surely would on the birds, and it did.