Ring and Circle Static Window Clings Anti Collision Window Decals for Bird Strikes, Glass Alert Bird Deterrent, Stop Birds Flying into Windows, Set of 21

There are three each of seven different sizes. Some decals peeled away from their backing quite nicely. Some took a little more patience. I didn't find it all that difficult. Perhaps try picking at the backing with an xaco knife? I didn't have a blade in mine so I didn't give it a go. I would recommend applying them when you have a reasonable amount of time & are not rushed or highly caffeinated! I was not excited about applying decals to my glass railing but they are quite beautiful. I like that you can remove them & reapply if you make a mistake. They have stayed on through high winds & a snow storm. Unfortunately, I cannot attest to how well they stop birds from flying into the glass. It happens very rarely. I hope that feature works to detour the little buggers.

The product arrived quickly & installed well when I followed instructions to remove the backing on each decal with 2 pieces of tape and mount on a wet surface (used a spray bottle). At this point, I gave 4 stars b/c they've only been up for a couple of days and I dk, yet, how well they work as a bird deterrent nor do I know how long the decals will stay mounted (i.e., will they last throughout the Canadian winter?).

At first I hated them because they didn’t stick and they were not sheer. Then I took a very long time trying to rip the back off and realized you are actually supposed to peel off the back it is just extremely hard so you may not realize it at first. Then I rub the back with a wet sponge and placed on the window. They work perfect and look beautiful! We have a bunch of new baby birds learning to fly that kept hitting our window now they are perfectly safe!

These work to keep the birds from flying into my big windows. And they are even quite cute and attractive.

We got these over a year ago for 2 large windows which we were having problems with birds flying into. It was fatal for birds a few times and the windows were broken twice costing hundreds of dollars to replace. These are super easy to put on, and if you decide to take them off, they peel off easily with no residue. They last through all weather conditions. The only time any came off is when my husband was pressure washing windows. I was able to rinse them off and put them right back on. None of them were even torn or damaged. Highly recommend.