Prism Window Decals for Bird Strike, Anti Collision Stickers, Stop Birds Flying in Windows

These stickers can help birds recognize glass, reducing bird collisions. You can also install them on your glass doors to warn people and pets so they don't collide with the glass door. These decals are made of prismatic window film. You can capture sunlight and transform it into amazing rainbows for your room. They can be applied both inside and outside your window. Just peel off the back and stick it on the glass with water. No glue needed. Removable and reusable. You will receive 21 round stickers and circular ones. These stickers have a diameter of 3 cm to 15 cm.