With a torch you might find the larvae feeding at night. Well known for the larval damage to flax/harakeke leaves, but less familiar as an adult.
Family
Noctuidae
Biostatus
Endemic
Host Plant
Flax/harakeke (Phormium tenax), toetoe, Carex geminata).
Larva
Feeds on host leaves, notching margins. Feeding observed on warm spring nights.
Pupa
Probably pupates in the soil at the base of the host.
Adult/Imago
September to April. Flies at night, attracted to light.
Forewing Length
16 - 20mm
Range
NZ
Habitat
Native forest edges, wetlands, coastal dunes, shrubland.