Surrey Wildlife Trust’s quest to find out if water voles are functionally extinct in the county continues. Which means I spent some of my bank holiday wading through a brook, looking for burrows, feeding signs, droppings and pawprints.
It was a beautiful day, and a beautiful site to survey. A small brook running through farmland, with earth cliff banks covered in brambles dripping with ripe blackberries. The stream itself didn’t have any vegetation in it, but the water was clear, the banks easily burrowable, and there was plenty of vegetation along the banks. So not entirely unlikely habitat for a water vole. In fact, we know there used to be voles here, hence we were surveying this site.
Charlotte (a fellow volunteer and my partner in crime for this survey) and I donned our waders, buoyancy aids and set off, stick and clipboard in hand. The survey involves one person wading in the river, looking for water vole signs (or mink, rat or otter for that matter), while the other keeps pace along the bank, drawing a map as she goes. We took it in turns to do the fun bit (the heat of the day made the cool water appealing, even though my waders were slightly leaky).
Disappointingly (but not surprisingly), we didn’t find any signs of water voles. There were a few holes too small for a water vole, and a few much to big. But not pringle tube sized holes, no vole droppings, no feeding lawns… I guess the good news is that we didn’t find any mink pawprints or droppings either.
Water vole populations have disappeared from 94% of their previous sites, the fastest decline of any British species. The last confirmed sighting of a water vole in Surrey was eight years ago. Surrey Wildlife Trust aim to survey around 200 sites where water voles have previously been reported. They’re also asking members of the public to report any water voles they spot in Surrey. There’s a handy ID guide on their website (which is useful as it’s easy to mistake a swimming rat for a water vole – in fact, the wonderful Ratty from The Wind in the Willows is actually a water vole).
The intrepid vole patrollers have so far surveyed 84 sites. But we haven’t found a single water vole sign. Plenty of mink. And rats. But no water voles.
The information from all these surveys will help Surrey Wildlife Trust work out how best to help water voles in the county. This may include predator (mink) control and possibly re-introductions, if there’s still enough suitable habitat in our crowded county. Our neighbours, Hampshire, still have water voles. I hope one day we can see them in Surrey again.