Bird Be Gone 360 Degree "Spider", Stainless Steel, 4' Diameter. Bird Spiders are stand alone physical bird deterrents used to scare large birds from concentrated areas. The Bird Spiders arms bounce and sway in the wind, creating a visual distraction zone, birds will not want to come near the area being treated. Virtually invisible, polycarbonate tips to prevent scuffing and easy to store away for later use. Ideal for use on boats and marinas.