How to prevent and get rid of birds?
For proofing, professional pest controllers will use methods such as barriers, spikes, nets and wire to great effect. More recently active systems like shock strips, audible scarers and optical gels have been used to create negative associations in birds wishing to land or roost on buildings. All of these methods of proofing have their merits, and some can offer a stronger and more lasting deterrent, but as with any method of control, they may become less effective over an extended period. For a heavy pigeon infestation, your professional contractor may have to employ methods of control such as shooting, trapping or flying of predatory birds.
Pigeon prevention, proofing and control are highly specialised skills, requiring specialist equipment and tools. Control of pigeons through population reduction techniques is generally both less desirable and less effective than removing their food sources and blocking off sites where they perch or roost. The latter technique, known as proofing, is now used extensively.