Bird-X polycarbonate bird spikes are 100% effective, humane, and only require a single application for years of efficacy. Prevent birds from nesting with irritating spikes that create a physical barrier to make surfaces uncomfortable or impossible to land. Tough, long-lasting polycarbonate material provides years of nearly maintenance-free protection. Transparent plastic material is light weight, low-profile, and invisible from a distance saving building aesthetics. Made from recycled materials, these spikes require no electricity and prevent the need for any dangerous or inhumane treatments such as poisons or traps.