The daddi long legs is a bird deterrent product. It is best for covering a larger surface area that is not a ledge situation, such as a roof or ventilation system. The daddi long legs comes in different circumference sizes (4ft, 6ft to 8ft) for the best coverage. The legs are not in a fixed position. Thin, stainless steel rods rotate in the breeze and wave menacingly, interfering with birds’ wings as they attempt to land. It is flexible, so that if a bird tries to land on it, it makes it an undesirable landing area. Birds tend to land on sturdy surfaces, thus the legs take that away. It is best to have the application area cleaned off prior to installation.