Date: 6/14/26 2:56 pm From: Chuq Von Rospach via Tweeters <tweeters...> Subject: Re: [Tweeters] how to prevent birds from flying into windows.
On Jun 14, 2026 at 14:08:06, Dennis Paulson via Tweeters <
<tweeters...> wrote:
> This was sent by a friend, and it seems reasonable, but I know nothing
> more about it.
>
> Begin forwarded message:
>
> https://www.youtube.com/watch?v=UC9xQkUtQ98 >
>
It’s a decent technique. Here’s the most recent from Cornell Lab:
Research has indicated a matrix of dots works quite well (an example of one
product that implements this is Feather Friendly:
https://featherfriendly.com/) — and yes, you can add dots manually if you
want with something like white-out but I’m not sure how weatherproof that
is.
One thing that research has shown that is NOT effective are those
bird-shadow appliqués. There was a study with the last year or two with
swallows in a flight chamber that showed no difference in strikes between
windows treated and untreated windows.
Chuq
---------------------------------------
Chuq Von Rospach (http://www.chuq.me)
Silverdale, Washington
Birder, Nature and Wildlife Photographer
