[2] The type specimen was collected by Patrick at Fortrose Spit in Southland on 24 January 1990.

[2] Populations of N. casanova have been found at Fortrose Spit, Tiwai Peninsula and Three Sisters Sand Dune, all in Southland.

[3] The female lays her yellow eggs in groups on the flowers of the host plants or alternatively singly on leaves.

[4] They are low but fast flyers and constantly vibrate their wings to enable them to take off rapidly.

[3] This moth is classified under the New Zealand Threat Classification system as being Nationally Vulnerable.