One of the largest family of butterflies in Australia are the Skippers (Hesperioidea) family, but then there are the subgroups, Awls, Flats, Skippers, Darts, Palm Darts, Swifts and Darters. I have taken photos of a few and find that they can be particularly difficult to identify from just the photo. Today I found a couple of obviously different species sunning on the same plant but one was off before I could get a shot but the other was a bit more obliging.
After comparing the photo to Skippers in my butterfly identification book and on a few websites I think it is a Pale Darter Telicota colon argeus which ranges across northern Australia and down as far as Sydney in open eucalyptus forests and grassy clearings on the edge of rain forest.