Vole in squirrel feeder

One of my squirrel feeders had been having food go but no squirrels of any colour were caught when I trapped under it, this went on for ages and as most of the maize was left and nuts and seed going I thought it could have been a red that had been trapped in the past so was wary of the cage ( which would have been good)so I had jumped a mile when I opened it to check and found this fellow in it! The feeder is about 4 foot up a tree.