Bank Vole feeding in the open

Twice in two days I've come across Bank Voles feeding quite unconcerned out in the open. On each occasion my initial thought was that the animal must be ill but both were able to run for cover when they wanted to. In the photo below a finger was used to push a stalk of grass out of the way and I've left the finger in to show how close we were able to get to it. I'm assuming both animals were very young and perhaps freshly emerged from the nest.

Bank Vole