Pest birds such as sparrows and pigeons carry a wide range of bacteria including salmonella and ornithosis. The nesting material, feathers, droppings, vomit, SPI, and mites, which are all found on birds, cause contamination and are hence potentially harmful.
Armour uses a combination of techniques that are humane yet effective to control bird menace. Birds will fight hard to reclaim an area where they have nested in the past. The only guaranteed way to keep them from coming back is to physically exclude them with netting, trapping, harassment and regular nest removal.