Save birds from window collisions with these lovely Holiday Star Window Gems.  They break up reflections on the glass and warn birds away in time to avoid window strikes.  Also great as holiday decorations.  They can be applied to the inside of the window or the outside.  The decals stick to the window purely with static cling, not adhesives, so they are movable, reusable and never fade. Comes in a package of 8 individual star clings, ranging in size from 4" to 8" tall Handmade in Mount Shasta, California Window Gems are made with a colorless translucent prismatic vinyl which captures sunlight and turns it into sparkly rainbows. They are stunning, constantly changing, and perhaps a teeny bit magical. Any bright light source makes the gems glow with rainbows, even moonlight.