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Last weekend I spent a whole hour observing a group of paper wasps that seemed to be playing in the sun. Whenever one of them set down on a leave there was another that came over it as if attacking or trying to mate. The first image shows one of those meetings. I really don't know if this is the time for nupcial flights or even if there were males and females in the group. In the sting of one of them there is something that looks like a drop: of venom or of semen? I'm sure there will someone capable of interpreting the situation better than me. The second picture shows a detail of the head for helping identification. I think it is a Polistes sp., maybe a P. Gallicus, but I'm not sure.

Thank you,

Joaquim Gaspar