Helps Reduce Bird Window Strikes: Birds often mistake glass reflections for open sky or trees. These bird window decals create a visible barrier that helps birds recognize the glass and avoid accidental collisions. Just peel and stick onto clean glass surfaces. These decals can be easily applied to windows or glass doors without complicated tools or installation. The black bird silhouettes are designed to be noticeable to birds while still maintaining a clean look on your windows, helping protect birds without blocking your view. Made from quality vinyl, the decals are designed to stay in place on smooth glass surfaces and withstand normal indoor and outdoor conditions. Each pack includes multiple bird silhouettes in different flying poses, so you can space them across the window to help birds notice the glass while still keeping your view mostly clear.