Common yellowjacket,
Vespula vulgaris
(08/2020 in Oberursel, Germany)

Until around mid-August they mainly feed on protein in form of insects or meat. This is how they supply the larvae. As soon as the adults no longer have to take care of the brood, they need sugar to survive. That's why they get annoying. But that's no reason to kill or torment them. They do valuable services: pollinate plants and keep the environment clean. In contrast to the wasp, humans have a large brain.