Not a species recorded in North Antrim. A lichen feeder.
They might look boring, clinging onto an old gravestone, but these little caterpillars build a protective case, of lichen and grains of the stone they are on, around themselves as protection. All examples of this species that have been found in Ireland are female. They are flightless and self fertile, so don't need any males.
Location: County Kildare
Photographer: Geoff Campbell