Last summer I realized that there is quiet a variety of wasps is our community garden. And I know that not only bees are pollenizer, but I was not aware of wasps doing the same job. I took several pictures of them, of which I now publish the nicest here.
UPDATED SPECIES NAMES (20.5.2016) Thanks to Alexandra Stevens (BUND Mainz) who contacted an expert.
However, I’m not an entomologist and I couldn’t identify them with my lay book and I tried to google them. While googling, I learned that I should really be sceptical about the results (I put the Wikipedia link and name below each picture). So here are the pictures, with the names I found. I would be happy about some feedback, if I got it, if I am wrong or if it is not possible at all to identify them with a picture. Most of them were either on carrots or onions.
Delta unguiculatus (German: große Töpfer-/Lehmwespe)
The next two ones I feel pretty doubtful about the names I found
I know there exist much better professional photos of those insects in the internet. Nevertheless, the picture I took myself are of course the prettiest ones for myself.