To some, pigeons are a visual and aesthetic problem. To others, they are only a problem when present in great numbers or when roosting on buildings or under bridges. Their droppings can disfigure buildings, and if left to accumulate, can cause serious disfigurement due to their acidic nature. But usually, pigeons do little if any actual structural damage to buildings.
Solutions
To prohibit pigeons from nesting on your roof, wood or metal sheathing can be installed on a ledge, on an angle that denies pigeons the opportunity to roost on flat surfaces. The angles should be no less than 45 degrees and no more than 60 degrees.
Bird wires will exclude pigeons from roof tops, ledges and awnings. Any type of bird wire will work; porcupine wire is the most effective.
Bird netting is an effective tool for pigeon exclusion. To purchase, contact your local garden center.
Repellents: We do not recommend use of chemical repellents for pigeons because of the lethal consequences and its danger to other birds. Poisoning is prohibited in the City of Greenwood Village.
Habitat Management: Frequently, large numbers of these birds are supported by well-intentioned individuals who regularly supplement them with bread, table scraps, or birdseed.
Exclusions methods: Pigeons prefer to perch on flat surfaces and certainly need these to nest. Nests are usually built under shelter and as much in a cubby as the parents can find. Netting is the tool of choice for many conflicts with pigeons as well as other urban birds when large areas have to be treated. Netting can be used to exclude birds from virtually any type of structure, from a house to an office building. To evict birds from window ledges, the netting is anchored to the roof, draped across the front of the structure and then tightly secured to the base and sides of the building. Netting can be used under bridges or inside buildings where pigeons perch on beams, girders, struts, and supports. The netting can be suspended below the perches to create a false ceiling that excludes the birds.