Anti-Collision Window Clings Bird Alert Collision Decals to Prevent Bird Strikes on Window Glass - Set of 12 Hummingbirds;

Not only are they helping to keep birds from crashing into our windows, but they look absolutely beautiful!
Simple to use, spray a mist of water on the glass, peel the cling from the backing paper and place them on the window, then gently press any air bubbles out. If you want to reposition them, simply peel them off and move them around.

Note: May not be used on mirror finish windows, because it is recommended to apply to the inside surface of the window.