Silver Ground Carpet (Xanthorhoe montanata)
The Silver Ground Carpet is a light sleeper and is easily disturbed during the day from grassy roadside verges, hedgerows and woodland scrub. It emerges early in the evening when things start to cool rather than as it gets dark and is not attracted to light at all so never falls in to the moth trap.
This is a widespread and common species throughout the country and is very common in Dorset. It flies from late May until mid-July and its larvae then feed on bedstraws and other low growing flowering plants.