Calling Card

I watched for an hour on Friday night and saw nothing, but I know a vole had been under the bridge that day because there were these bits of feeding underneath; I retrieved them with my extra-long litter picker. Tonight I stopped by for just ten minutes and saw a big adult water vole almost straight away. There doesn't seem to be any regular pattern to their movement, though I'm told they work on 'four hour cycles' of below/above ground activity.