A simple string that keeps elephants away

“The string, commonly known as parachute yarn, is strung at a height of around eight feet in the anticipated route of wild elephants. Once the elephant – an adult is more than eight feet in height – brushes against the string, the hair on its head gets entwined in it. With a feeling that the elephant particularly detests, the animal halts, and then retreats with the herd on its heels. ” - The Assam Tribune