The effectiveness of bird spikes depends heavily on whether they match the "bird pressure" and the size of the pest.
Buying bird spikes is an effective, humane way to prevent larger birds like pigeons and seagulls from landing on ledges, roofs, and fences. When selecting a product, the most critical factors are the material, the target bird species, and the width of the surface you need to protect.
Bird spikes are typically available in two main materials, both of which usually feature a UV-resistant polycarbonate base.