WindowAlert decals help prevent wild birds from accidently striking windows. Each decal has a special coating that reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but birds see it as a brilliant glow much like a stoplight. To the human eye, the decals appear as frosted or etched glass.
For best results, the decals should be placed on the outside of a window. As a rough guide, we recommend one decal for every 3 x 3 section of glass.
2 set of 5 static-cling decals. The Elm, Oak, and Maple leaf decals measure approximately 4 across. The two Aspen decals measure 2″ across.
