UV Reflective Anti-Collision Window Bird Stickers Decals Glass Door Protect and Save Bird Strikes, 12 PCS (Clear)

These definitely work! Had quite a few larger birds hitting back door window but these stickers have stopped that. Very easy to apply. They are fixed to the outside and initially I thought they wouldn't stick for long, but they have stood up well to window cleaning etc and are still stuck fast. They don't distract from the view of the garden either.

Look attractive on window. No bird strikes yet.

Very pleased. The stickers are easy to apply. Have only been on the glass 10 days or so, but no collisions or fatalities so far. They certainly seem worth the money. Quite happy with the size range, small to medium.

I recently took my string fly curtains down from my patio doors and within a few days had 3 fledglings fly into the glass, so I quickly ordered these stickers to prevent this happening again. The stickers go on the outside of the glass and come in varying sizes. They are applied easily and stick well to clean glass. They are slightly frosted so I don't worry about the odd few bubbles. We have had no more birds flying into the glass since putting them on.

Understated but very effective. Easy to apply (with care) and not troubled by either heavy rain or the window cleaner.

Looks good but the young birds still fly into window, even though I have used 2 full packs. Only on death but I’m unwilling to use more stickers as I won’t be able to see through the windows.

Easy to apply and having followed the advice to apply to the outside of the patio doors, I was pleased that they stayed in place when the window cleaner arrived the day after I put them up. We’ve had no bird strikes so far (4 weeks or more) and the stickers are relatively unobtrusive so don’t spoil the outlook to the garden.

These have to be attached to the outside of the windows as opposed to inside. This could make window cleaning difficult especially if the window cleaner uses brushes. I'm not sure they would remain stuck to the glass and remain effective.