Epicoma melanospila - these caterpillars feed gregariously during the day. We found this large cluster in an Acacia longifolia bush. They disappeared suddenly in late autumn. Later stage larvae are reported to be solitary feeders and are widely scattered. The earliest sightings of the adults on iNaturalist are in late spring, so the larvae apparently feed right through winter. We often see the adults from early summer onwards on our lightsheets, displaying its eponymous wing pattern.