Book 25, Question 72
What are the big orange balls on some power lines?
Those balls are markers that make power lines easier to see for low-flying airplanes and helicopters.
They are bright orange or white so pilots can spot the wires from far away. Some lines also have spirals or flappers that help birds see them. These simple devices help keep both pilots and birds safe. Stay far away from power lines, and never fly a kite or climb a tree near them.