In my experience, any bird or animal will eventually get used to whatever you try as a deterrent. In the Spring, I've seen birds sit on the heads of the plastic owls with the swivel heads in the orchard. They sit right next to the sparkly objects hanging in the cheer tree and peck away at the fruit. When I used to have a lawn, the gophers would dig right next to the battery operated "mole poles". I decided it was time to share with the wildlife. I'm happier for it. Bird nets on the fruit trees would probably help, but I'm too lazy! LOL
In my experience, any bird or animal will eventually get used to whatever you try as a deterrent. In the Spring, I've seen birds sit on the heads of the plastic owls with the swivel heads in the orchard. They sit right next to the sparkly objects hanging in the cheer tree and peck away at the fruit. When I used to have a lawn, the gophers would dig right next to the battery operated "mole poles". I decided it was time to share with the wildlife. I'm happier for it. Bird nets on the fruit trees would probably help, but I'm too lazy! LOL