While the moth in the previous post mimics a wasp to ward off predators, this nasty-looking fellow is the real thing.
Wasps are closely related to ants and bees, and have been around since the Jurassic period.
Their colonies stop breeding new workers in late summer to early autumn, and they start looking for sugary foods, hence likely bumping into humans. And they sting.
Fortunately, this wasp was busy with the nectar and didn’t mind me as long as I kept still.