Over the years, everything from gas canons, pyrotechnics, lasers, ultrasound, stuffed owls and radio-controlled model aircraft have been tried to scare birds away from runways.

• 多年来，气体标准、烟火使用、激光、超声波、猫头鹰标本和无线电控制的模型飞机，这一切都尝试着将鸟从跑道上吓跑。