Bird spikes are humane, physical barriers made of long, needle-like rods on a base, designed to prevent birds like pigeons and sparrows from landing, roosting, or nesting on ledges, signs, roofs, and other structures by making the surface uncomfortable without harming them. Made from durable, weather-resistant materials like polycarbonate or stainless steel, they are easy to install with adhesive, screws, or ties, offering a low-maintenance, effective, and non-lethal solution to property fouling and health hazards from bird droppings.