Stop birds from crashing into windows with WindowAlert static decals. Each decal brilliantly reflects UV light which birds can see, while humans cannot. Available in Maple Leaf and Hummingbird. WindowAlert is a static-cling or low-tack adhesive decals that are applied to the exterior of glass windows. A special component in each decal brilliantly reflects ultraviolet light, which birds can see while humans cannot. The decals act as a neon stoplight for birds. 4 decals per pack.
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