There are several methods of preventing bird-window strikes. The use of ultraviolet (UV) signals to make windows appear visible to birds, while once one of the most common means of combatting this issue, is no longer recommended by experts. This is because while some birds can see UV light, not all can. Other solutions include window film (as long as it is placed on the exterior of the glass) and ceramic frit glass (glass with fritdots).[30] Windows can also be covered with decals spaced no more than 5 cm horizontally or 10 cm vertically to prevent collisions.[31]
I had assumed it was cheaper to do dots, but it’s actually just more broadly effective. That’s a better reason :)
From the wiki for bird-window collisions:
I had assumed it was cheaper to do dots, but it’s actually just more broadly effective. That’s a better reason :)