Pigeon droppings are not only unsightly; their acid content can eat into soft stone and cause long-term damage to buildings. The nest droppings, and feathers also block gutters and rainwater pipes causing water damage.
Their droppings can lead to severe hazards on pavements, especially for the elderly, and can carry pathogenic organisms. Pigeons can carry a number of potentially infectious diseases such as salmonella, tuberculosis and ornithosis (a mild form of psittacosis – pneumonia-like symptoms). They are also a source of allergens, which can cause respiratory ailments like pigeon fancier’s lung and allergic skin reaction.
There is potential for these illnesses to be spread to people through contact with pigeon droppings, dandruff and feathers; pigeon parasites; or where dead infected pigeons get into food or water sources.