Hi Fiona, I'm glad Glenn knew it wasn't a moth, since it is perching like one with the wings flat. It's in the skipper subgroup of butterflies, which usually perch with their wings sort of half folded. Our butterfly books say the larval food plants are various rainforest trees such as blueberry ash and lillypilly, plus kurrajong. The larvae are rather striking, black and white and yellow - worth keeping a watch on any kurrajong trees you might have around the place. They shelter and eventually pupate inside a single folded leaf, but they wouldn't be the creature than glues a whole lot of kurrajong leaves together, which I assume would be moth larvae hanging out in groups. We get the latter in our young kurrajongs pretty regularly and they are voracious feeders. I see your Buddleia is continuing to be useful.
Thanks for the info Jackie. I will have to look up what a Kurrajong tree looks like. As for the Buddleia, I made the hard decision to prune it to encourage a second flush. Hopefully, I will be rewarded with more flowers and bugs.