Bird spikes are devices that are designed to deter birds from landing or roosting on surfaces such as ledges, rooftops, and signs. They consist of long, thin spikes that are usually made of stainless steel or plastic, and they are placed on the surfaces that the birds are landing on. The spikes make it uncomfortable or impossible for the birds to land, perch, or roost on the surfaces, which helps to prevent bird droppings, damage to property, and other problems associated with bird infestations. Bird spikes are a humane and effective way to deter birds without harming them, and they are commonly used in urban and suburban areas to control bird populations.