WindowAlert Butterfly UV Decal helps prevent wild birds from accidentally running into your windows. Each decal has a special coating that reflects ultraviolet sunlight that is invisible to humans while birds see it as a brilliant glow much like a stoplight. To use, simply place ...WindowAlert Butterfly UV Decal helps prevent wild birds from accidentally running into your windows.
Each decal has a special coating that reflects ultraviolet sunlight that is invisible to humans while birds see it as a brilliant glow much like a stoplight. To use, simply place the decal on the outside of your window. Concentrate decals at center then work out, placing decals at a minimum, on every 2 feet of glass.
For maximum protection, scientific studies suggest placing decals 2 inches horizontal, by 4 inches vertical, from one another.