Most of the drystone walls we see today are products of the post-medieval move toward enclosure.
In the lower slopes of the Highland Zone the walls are rough and irregular in shape, enclosing small farms dating to the late medieval period and the 16th century.
Many monastic houses, particularly those in remote locations favoured by the Cistercians, favoured walls of dry stone, and many of these medieval walls can still be seen (notably at Fountains Abbey in Yorkshire).
Drystone walls are not merely features of agricultural interest; they are in a sense, living history; a legacy of the movement towards enclosure of common farming and grazing land as English society moved away from feudalism.
It is likely that the species responsible for it's construction was the Median Wasp The only way to accurately determine species' identity, is to look at the head markings - paying particular attention to the amount and shape of the yellow and black markings on the forehead, together with yellow markings on the thorax.