Not sure of the best place to put this, so decided on here.
The garden has a few rowan trees and cotoneaster bushes, and one hawthorn. All have a lot of berries now.
However, around the garden we are finding small clumps of berries on the ground, as in the attached photo. At first I thought these were being eaten by animals(pine marten, badger or birds) and then passed out. The berries do not look digested, even partially, and now I think they might have been eaten, irritated the animal, and were regurgitated.
So far we have found about six such clumps. I thought animals were able to distinguish between edible and non-edible/poisonous plants.
I can't quite make out what sort of berries they are... are they a mix of all three of the ones you've got growing? They look like cotoneaster berries mainly- I would think only birds would eat those, but I can't think why they'd regurgitate them, either.
Maybe something is just gorging on them because they're plentiful, but overdoing it a bit?
I've seen similar caches of rosehips made by a woodmouse, and watched as it carefully extracted the seeds. The flesh of rosehips is of course particularly indigestible, containing as it does irritant fibrous material, but many berries have a purgative effect precisely to ensure safe passage of the seed, so maybe these berries are also being 'mined' solely for the seeds.