Hi Mary, When I download the image and zoom in, I can see at least three things that might be a glider or might be leaves. In short I cant see it. The AI (Carbon) says it can see one. I'm unsure how to interpret that. However I think you know the species from other sightings so I will verify this record, based on your verbal description. The only local species of mid-size grey glider is Petaurus notatus, Krefft's Glider (which we formerly called Sugar Glider).
I think this is a MALE Acroceuthes metaxanthana (Tort) which has fluffy white 'shoulders' and on its 'face/head' which can be just glimpsed in this shot. [female is brown with concentric circle markings] See https://bold-au.hobern.net/specimens.php?taxid=365516 https://moths.csiro.au/?s=Acroceuthes+metaxanthana https://inaturalist.ala.org.au/observations?taxon_id=471448
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