Date: 2/8/26 1:28 pm
From: Norman Budnitz (via carolinabirds Mailing List) <carolinabirds...>
Subject: Re: bird box squirrel preventer
We use these for our bluebird nest boxes. These are 1.5 inch diameter.
There are also 1.125 inch versions. There may be other sizes available.

https://www.amazon.com/dp/B09295PMPV?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0&th=1

Norm

On Sun, Feb 8, 2026 at 12:47 PM Christopher Hill <carolinabirds...>
wrote:

> Hi all,
>
> I have a box that Great Crested Flycatchers nest in every spring and
> summer. In the winter some squirrel always makes it their personal project
> to enlarge the hole and turn it into a squirrel nest. I would like to
> install a metal guard with 1 5/8" hole (or whatever, I'd have to go back
> and check the proper diameter) to prevent a third re-occurrence when I
> reclaim the box for flycatchers this spring. Just a piece of sheet metal
> with a hole and no sharp edges or burrs (so I don't want to try freehanding
> with tin snips, for example). Googling doesnm't work for any combination
> of words I have come up with - infinite places wanting to sell you baffles
> for a pole, but no metal hole guards. Anybody have an idea or a source?
>
> CH
>
> Chris Hill, Ph.D.
> Professor
> Biology Department
> Coastal Carolina University
> Office: Douglas 207H
> (843) 349-2567
> email: <chill...>
>
>

--
Norm Budnitz
Chapel Hill
North Carolina

 
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