The ancient Celts & Druids believed in general that moths could travel between the natural and supernatural worlds. These nocturnal creatures were seen as "messengers" who could bring news either of the dead (& those about to die) or from the deities of the mystical Otherworld.
Next time you're alone in the forest & an eerie silence descends; pay attention to the verdant moss on the trees. Some of what you think is moss might be one of the "moss people". Beware though, these creatures are part of changeling lore. They can also send & cure sickness.
We were camping in a remote valley on the edge of Exmoor. The twisted trees were deeply moss covered. In the half light they took on wild supernatural forms, appearing at times like living creatures. Oddly, thick moss also was present when I became pixy-led in the woods once.
Celtic older women were revered as the 'wisdom keepers'. Over time they were called the 'Crone' which derived from the word 'Crown' meaning they were illuminated 'shining ones'. The church feared these wise women, murdering & relegating them to the role of the 'evil ugly hag'.