Baby water voles are weaned at 14 days.
A slightly older but still not fully grown vole.
The plank I put down is now being heavily used as a latrine.
This very small vole at the top must be pretty new out of the nest because its body's only slightly longer than the apple core it's travelling past - about 3-3 1/2 inches. But the young vole was swimming confidently on its own, and certainly knew how to duck out of sight beneath the grassy overhang.