Transparent static-cling window decals (Window strike deterrent)

Millions of wild birds are killed each year flying into windows. Now you can help reduce this loss of life!*  WindowAlert is a static-cling decal that may be applied to home and office windows. The decal contains a component which brilliantly reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but glows like a stoplight for birds. Birds have vision that is up to 12 times better than that of humans. To the human eye, the decals appear as frosted or etched glass. Each decal measures approximately 4" across. WindowAlert decals are designed to be placed on the OUTSIDE of a window. As a rough guide, we recommend one decal for every 3' x 3' section of glass. * WindowAlert decals help birds see windows and thus avoid striking the glass. Window Alert decals may be used only on an exterior glass surface free of any overlay, tinting, film, or coating. Clean glass first with water. Avoid use of chemicals such as ammonia or window cleaners. Decals are best applied when gl