A new exterior film for glass has been developed which can be seen by birds but not humans. It could be used to help prevent the needless deaths of billions of birds which collide with windows annually.
Collisions with windows are estimated to be the most common cause of bird death worldwide aside from habitat loss. The numbers of deaths are staggering, outranking deaths by domestic cat, hunting, vehicular collisions, and wind turbine accidents combined. Thus, preventing bird-window collisions could be the simplest way to significantly reduce bird fatality around the world.
