In the UK, the British Trust for Ornithology estimates up to 30 million birds die every year from hitting a window. It's all well and good inviting birds with bird food and nest boxes, but if they start hitting your windows, then a trip to your garden may be a perilous journey. A fun and easy way to prevent birds from flying into your windows involves going back to an amusing childhood hobby...stickers! You can place special stickers on windows to alert birds and deter them from a collision. In order for it to be truly effective, be sure to place the stickers no more than 2-4 inches apart (birds like to fly through larger gaps).

• Each pack contains 4 decals.
• Each decal has a coating that reflects ultraviolet light which glows bright to a bird, but is invisible to humans. To humans the decal appears as frosted glass. 
• No adhesive required, as the decal clings by natural static attraction.
• Designed to be put on the outside of the window.