Last summer I was visited by this unusual golden fly, whose kind I have never seen before. It was impossible to scare away so I could take relatively good pictures.
The pictures on this hobbyist page suggest, it is a "Golden blowfly". Those pictures were taken in Australia. The only paper I could find on golden blowflies locates the species in Australia as well. However, I took my pictures in southern Germany.
What is this fly? Is it an invasive species or native to Germany as well as Australia?