You gained’t see the spikes from the distance given that they are created of obvious polycarbonate, exactly the same substance used to make shatter-proof eyeglasses. Additionally, the Bird-X Electronic Repeller minimizes the risk of disease and parasite spreads related to pigeons including crimson blood mite, Dermanyssus gallinae, and Argas reflexus. https://britedirectory.com/listings12987357/details-fiction-and-installing-a-pigeon-repellent-in-arar