@TawnyCam on Twitter suggested they may be tawny owl pellets:
http://twitter.com/TawnyCam/status/1922863008On the website they link to in their message, click the "Pictures of
pellets from various bird species" link on the right, then click on the
resulting thumbnails.
Looks plausible.
Charles
three.
> They are slightly larger than mouse dirts. I can find nothing like
them
> in
> the animal signs and tracks book.
>
> Patrick
>
>
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