Millions of birds die or are injured every year when they hit windows. I had dozens of birds fly into the windows at my house. I taped a strip of this ribbon to the top of each window so it hangs down. It turns and twists in the breeze and alerts birds that the window is not an open space that they can fly through. It seems to have worked very well so far.

We live in an apartment on the East China Sea in Japan - barely a 1/2 mile from the water’s edge and the pigoens [sic] love our balcony! This tape is wrapped to hang along our balcony and shines reflectively against the sun and makes noise against the wind. Works great! We’ve tried a fake bat, owl, snakes, even WD-40 on the balcony - you name it! Our balcony has been pigeon and poop free for a year now.