I was down at the town car park, looking at the feeding signs and droppings that told me water voles were still very much present - even though it's hard to see much through the undergrowth. Suddenly the tiniest vole I've ever seen in ten years of watching swam past. It was only the length of a small mouse; in fact when it sat down to eat, its size and shape put me in mind of a furry Brussels sprout. As you can see from the photo, it was small enough to sit on a glyceria leaf!
There were also two adults about, so this stretch of the brook is clearly as busy as ever.