Review on 🐦 Bird Blinder Colorful Hummingbird Window Stickers (12 pack) - Prevent Bird Strikes with 6 x 8 Inch Anti-Strike Window Decals - UV Vinyl Cling Sticker for Glass Windows - Bird Collision Prevention by Jennifer Rosell

These were the third bird decals (or whatever) I've tried. The rest was almost entirely outside, so I have no idea how they would keep the birds from hitting the window (actually, there weren't any). But I installed these hummingbirds in front of the window and they are clearly visible. No birds have hit the windows since I hung them, but there's no way to know if this is correlation or causation - we have fewer backyard birds anyway due to migration. I just wish there was a larger selection of different stickers. There are only a few of them, so they are repeated on the window, which is a bit boring.