Q&A Does BBB work for any kind of bird? Tests conducted over 3 years in Japan show that Bye-Bye Birdie is effective on all bird species, including sparrows, pigeons, starlings, and particularly crows. (For the degenerative bird that has lost its sense of geomagnetism, the device may not work as intended.) What is the difference if I switch to use from a conventional device to BBB? You may have tried noises or "owl" to frighten birds. You may have also noticed that once birds learn that such devices are not harmful, they get used to them. Or some of device hurt birds. BBB's permanent magnetic system continues to disturb the geomagnetic field and create a preventive sphere without hurting them. Is there any cost to operate and maintain BBB? The device costs nothing to operate or maintain, because there is no electric needed. How large an area does the BBB Power Wing cover? The BBB Wing's special magnetic structure creates a field that covers up to 70 ft. radius. What about safety and effects on plants, pets and human beings? Bye-Bye Birdie is a safe product for plants, pets, human beings and the environment.