Larvae are found on hound's tongue fern and kiokio.
Hound's tongue fern, kiokio
Specialised setae pair on abdomen triggers defensive response when touched (drops from host vigorously twisting to hide in leaf litter).
Pupates in silk cocoon among host fronds or in detritus.
Males have simple antennae. September to April. Fly at night, visiting flowers, attracted to light.
16 - 20mm