At this time of year on our hill paths there are numerous small piles of wet, possibly part digested Rowan berries.
I have never seen what leaves these deposits and they are found almost exclusively on the footpaths.
I know that migratory thrushes (fieldfares,redwings) feed on the hill rowan crop but I have never seen them frequent paths after feeding. Maybe they eject them from their crops for some reason while picking up grit on the tracks? Or are the culprits Pine Martens?
No doubt some venerable and more knowledgeable hill man than I can solve my little mystery?