The Udzungwa National Park is a great natural wonderland. Elephants roam around in the forest and the farming families have been growing their very special cocoa for generations. It only goes wrong when the elephants trample the fields and devour the harvest. What can farmers do about this? An elephant is not easy to stop. There is a practical solution: elephants turn out to be terrified of bees. They quickly learn that when they disturb a beehive or hive and are covered in stings. So placing beehives in a tide as a fence keeps the elephant away. Simple and particularly nature-friendly. Now the Udzungwa farmers are safe behind their honey-producing “fence”.