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Argiope bruennichi
They build their web only about a meter off the ground to catch the low flying insects such as bees and wasps that travel from flower to flower. Their web is almost invisiable, only for the zig zag strips on the web you wouldnt see it. These zig zag strips are known as the stabilmentum, they form these strips to warn bigger animals of its location, so they wont destroy it by walking through it.
I have same spider spotting...
http://www.projectnoah.org/spottings/738...
Here in the USA, we have a similar one, a cousin of sorts, the Banded Argiope with the same zig zag. I noticed the orb weavers make the pattern during the summer, but not towards fall. Great photos by the way. :)