Streaked Notodontid (Destolmia lineata)
Medium sized flat faced moths with grey and white wings occasionally streaked with fine, short dark brown lines.
Looks a little like some of the plainer Cossidae except around the head. 70mm wingspan. Attracted to lights.
This one settled on a Ford roof next to the national park.
http://lepidoptera.butterflyhouse.com.au/noto/lineata.html

''Destolmia lineata'' is a moth of the Notodontidae family. It is found in Australia. The larvae feed on ''Eucalyptus caesia''.
Similar species: Moths And Butterflies
By Mark Ridgway
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Uploaded Mar 17, 2016. Captured Nov 25, 2013 22:58 in 1250 Burwood Hwy, Upper Ferntree Gully VIC 3156, Australia.