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 is easy to apply and peel off glass. Use Window Alert decals on home and office windows. Each 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. WindowAlert decals help birds “see” windows and thus avoid striking the glass.
The decals are approximately 4” across and should be placed a minimum of one every 3×3 feet of glass, on outside of window.
To the human eye, the decal appears as frosted or etched glass.