Sometimes referred to as the Blue Underwing, the Clifden Nonpareil is a very large and impressively beautiful and rare moth.
This unmistakable insect is strongly attracted to sugar at dusk and will come to light but can also be seen by day at rest on tree trunks and walls. It has even been recorded flying inland from the sea.
Winter is spent as an egg on the foodplant with the caterpillars hatching the following spring when they can be found through to July, feeding at night. The pupa is made in a silken cocoon that is spun between leaves or among leaf litter.