Review on 🐦 Bird Alert Window Clings - Set of 12 Hummingbirds: Anti-Collision Decals to Prevent Bird Strikes on Glass by Karla Schwinden

Used three weeks ago and haven't seen a bird since. .this is how they appear EFFICIENT. We've had numerous occasions where we've seen hummingbirds hovering just outside our window as if trying to figure out who the big bird in the window is. But they hover and then fly away. Much better than before! I gave them one star because of quality control issues in production. There are three sheets of stickers in the package, two of which are excellent. The birds were easily detached from the substrate and glued according to the instructions. However, one sheet was perforated incomplete / but defective around the image, requiring careful trimming with nail scissors to free them. Luckily the imperfect leaf wasn't the first and I felt confident and willing to make an effort to free the four images on the last page.