Bee sounds used to keep elephants off Assam railway tracks
To keep elephants off railway tracks, the Northeast Frontier Railway has deployed devices that amplify the buzz of swarming honeybees, which scares away elephants. The device costs around â¹2,000 to put together and is audible to an elephant 600 metres away. This comes after train-hits killed 16 elephants in 2016, and at least six this year.