Seagull spikes prevent all types of gulls from perching on their desired areas. Including window ledges, balconies, guttering and chimnies. Seagulls are known carriers of diseases, and their guano is highly harmful to humans when inhaled. Therefore, taking steps to manage a population is crucial to maintaining a healthy and safe environment for your customers and staff. As with all our spikes for birds, you can purchase by the meter or in packs of 10 or 100.