This Female Golden Orb Weaver Spider is missing a leg. I thought it may have been tucked up with another of the front legs but closer examination reveals it is missing. The golden orb weavers [Nephila edulis] are one of the largest spiders found in Australia. Their webs with diameters of over 1 meter can be found hanging off sign posts, in or between trees.
Female spiders can measure up to 45 mm while the smaller males measure only 6 mm. The male is often found in or around the web of the female.
Beside the male and the female boarders resides in the web. They are called quicksilver, dewdrop or droplet spider (Argyrodes antipodianus)
because their silvery body shines like drops of water in the sun. Further details at: http://www.ozanimals.com/Spider/Golden-Orb-Weaver-Spider/Nephila/edulis.html