A grid of heavy gauge monofilament line spaced at six-inch intervals may also be used to create a fence that will interfere with the birds' normal flight pattern to the roosting area. The needle-like strips of stainless steel act as a prickling fence to exclude birds permanently without harm. Pigeons prefer to roost on level surfaces. Roosting areas can be modified to create a sloping surface, at a 60 degree incline or more, by installing wire mesh or other material to eliminate the level surfaces. There are also a number of non-toxic sticky substances registered as tactile repellents for bird control efforts.
Birds tend to avoid landing upon treated areas but the effectiveness is usually lost over time.
Although time-consuming and unpleasant, removing nests will help depress populations. Nest destruction must be followed by pigeon-proofing the structure to achieve maximum population control. Local municipal ordinances should be consulted prior to any control effort that will involve the discharge of firearms. There is only one product registered for lethal control of pigeons in Connecticut and can only be used by a certified pest control operator under a special permit from DEP Pesticides. The product is generally not appropriate or feasible for most nuisance situations experienced by the average homeowner.