The introduced European Winter Moth Operophtera brumata is usually a rather featureless grey (like the November 10 photograph), although some specimens can be quite well patterned. I think the European one is the one most often (almost exclusively?) seen in Victoria. The native Bruce’s Winter Moth O. bruceata (which Bill Katz and Jeremy Tatum have found at Goldstream Park), is usually well patterned. Annie Pang sends a photo of a winter moth from her kitchen window in Victoria. Although it is well patterned, Jeremy Tatum and Jeremy Gatten believe that this is a European Winter Moth O. brumata.
Winter Moth Operophtera brumata (Lep.: Geometridae) Annie Pang