Bird spikes are a type of deterrent used to prevent birds from landing or roosting on buildings, ledges, and other surfaces. They consist of long, thin spikes made from materials like plastic or metal, which are installed in rows. The spikes create an uncomfortable surface for birds, encouraging them to find alternative resting spots. These devices are commonly used in urban areas where birds, such as pigeons and seagulls, can cause damage or create unsanitary conditions. Bird spikes are effective because they do not harm the birds; instead, they simply make it difficult for them to settle in unwanted areas.