There are some low-cost products that will scare or distract pest birds without harming them. Here are harmless bird control products you may want to consider:
Hawk Decoys. Pest birds will see these realistic-looking decoys like a real hawk standing by and ready to strike. These realistic looking decoys are made of heavy-duty plastic to make look real. You can put these decoys in any high visibility area of your garden. Just change the location of the decoy from time to time to keep pest birds intimidated.
Scare Bird Diverters. These scare diverters intimidate pest birds with a predatory eye on a reflective surface. The bird scare products have swivel attachment to make it more effective to allow it to rotate 360°. Place it to fences, trees and patio covers.
Flash Tape. This 50-foot roll of tape is made of iridescent foil. It can be easily cut into short strips and have it attached to high visibility areas of your garden. The tapes snap in the wind and illuminates sunlight to intimidate pest birds.
Bird Scare Balloons. These balloons are about the size of a standard beach ball and covered with realistic reflective predator eyes and markings. When pest birds see these balloons they will think a giant predator is standing by. The vinyl used on these balloons is UV-resistant and weather-resistant. Place it to fences, trees and patio covers.