Window Alert - Protective Bird Window decals

Window Alert - Protective Bird Window decals
Window Alert - Protective Bird Window Decals. If you`ve ever had a bird crash into your window you know you need the Window Alert. Each year, millions of birds are killed flying into windows. The Window Alert decal contains a component which brilliantly reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but glows like a stoplight for birds. The decals are approximately 4" across and should be placed a minimum of one every 3' x 3' of glass, on outside of window. To the human eye, the decal appears as frosted or etched glass. The decals are packaged 4 decals per envelope.