NTT e-Drone Technology carried out a verification experiment in Kanagawa Prefecture in January and February last year. The drone emitted the laser beams on eight days of each month, dispersing a flock of around 80 crows. "The lasers' influence lasts for a month or so," an NTT e-Drone Technology representative said. "Regularly flying the drone can help retain the effect." NTT e-Drone Technology intends to popularise the laser system nationwide. It said it has received a steady stream of inquiries from throughout Japan and abroad. The company is also considering using the mechanism for other types of trouble. A verification test, for example, showed that the drone is effective at preventing crop damage not only from birds, including doves, but also from pesky animals such as wild boars and deer.