The tape 'hums' in the slightest breeze deterring birds from attacking growing crops. Place several stakes at the outside of the area to be protected & stretch the tape between them. Use on Newly seeded lawns, Vegetable gardens, soft fruit & fruit tree buds, Ponds (to deter Herons) Roosting sites where fouling occurs (e.g. cars, boats, & washing lines). Simple, safe & very effective. No harm is caused to the birds.