St Andrew's Cross Spider (Argiope keyserlingi)
Argiope keyserlingi is used to having kleptoparasites (Milichiidae) around but this fly is really pushing it's luck !!
Are Milichiidae known to bubble or could this be something else going on ?
Found among Gahnia grasses in a local nature reserve. Kings Park.

"Argiope keyserlingi" is a species of orb-web spider found on the east coast of Australia, from Victoria to northern Queensland. It is very similar in appearance to a closely related north Queensland species, "Argiope aetherea".
Similar species: Spiders
By Mark Ridgway
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Uploaded Mar 16, 2016. Captured Jan 8, 2015 00:34 in 59 Acacia Rd, Ferntree Gully VIC 3156, Australia.
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