In my experience, decals have not worked, but something moving, such as a
thin mylar ribbon that moves with the slightest breeze, was effective.
Here's a pic and little video clip of what I'm talking about:

https://thecottonwoodpost.net/2018/10/13/how-to-stop-birds-from-flying-into-your-windows/





On Mon, Aug 30, 2021 at 8:27 AM Zora Monster <zoramon at mac.com> wrote:


> Wild birds unlimited sells decals for windows. The instructions tell the

> user to apply to the outside of the window. The decals reflect UV light, if

> memory serves me correctly. That reflective surface is on the outside of

> the decal, so mounting them inside renders them useless.

>

> Zora

>

> Sent from my iPhone

>

> On Aug 30, 2021, at 8:14 AM, Vanderhoof, Jennifer <

> Jennifer.Vanderhoof at kingcounty.gov> wrote:

>

> 

>

> Joan and others,

>

>

>

> Something I learned from the Portland Audubon window strike study that is

> not widely publicized, unfortunately, is that anti-bird strike window

> treatments are best applied on the outside of the window. I know Seattle

> Audubon sells stuff. But if you apply it on the inside of the window, the

> outside still has the shiny reflective surface that can reflect the trees

> and make it appear the birds are flying through forest when they hit your

> window.

>

>

>

> Jen

>

>

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--
Steve Hampton
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