As part of my wildlife friendly management of the orchard I have laid down a number of sheets of corrugated iron and big planks of wood in quiet corners of the grass. These provide shelter (underneath) and basking places (on top) for small mammals and reptiles. Every couple of months I lift them to check who is 'at home'. There is a mad scramble for burrows and usually all I get is a glimpse of retreating furry bottoms.
an idea of the burrow network.