These special decals help birds see windows and avoid collisions. WindowAlert is transparent and nearly invisible to humans, but they reflect ultraviolet light that is clearly visible to birds.

What humans see

What birds see
WindowAlert UV decals warn birds of plate glass windows better than other decals because our decals reflect UV that birds more readily see. Birds have vision that is up to 12 times better than humans and are sensitive to UV light, which cannot be seen by humans.
The transparent WindowAlert decals glow like a stoplight for birds, but do not obstruct the view out the window for humans. They adhere to windows via static cling and come in packets of four, in either square or maple leaf designs.