The field vole (or short-tailed vole) is dark brown with a blunt face and short tail (obvs). The staple diet of many of our owls and birds of prey, its populations go in four-year cycles of boom then bust. They are everywhere, but rank grassland is their ideal habitat. This spring, after the snow had melted I was amazed at just how much evidence of them there was. Feeling safe with snow cover, they had tunnelled under the snow but on top of the ground, leaving vole paths in the grass when the snows retreated.