Well, I do not know.
Last summer I walked on a walking track to Bondi Beach (Sydney). During the walk, I have seen whole trees infested by orb weavers - literally wrapped up. The nets (or rather whole 3D structures built from the nets, by hundreds of spiders) have been 10m+ long, spanning the distance between trees. There were hundreds of spiders, not as big as this one - but big enough (and remember, in Quensland everything grows bigger). Unfortunately - I only had point-and-shoot camera, but no picture could describe the size of the spiders and their sheer number - as one needed a reference objects, and I could only shoot against the sky. It only could be appreciated by being there - and it was not nice.
And, a 6" huntsman sneaking inside the house and sitting on the wall is something I mostly stopped paying attention to.