Flock Blocker

Window-caused bird mortalities claim over 1 billion bird lives each year. But we do not need to let these bird deaths continue. With a little DIY attitude, a white window marker, and our Flock Blocker, we can reduce bird collisions on windows and reflective surfaces by up to 95%!
This well-studied pattern of white dots is one of the most effective methods to reduce window collisions while maximizing your view of your favorite backyard birds. Simply fill your window with this anti-collision grid. For full instructions on use, please see our YouTube video for a demonstration of Flock Blocker use!