The mimicry of these flies is superb: They have a more rounded abdomen like wasps and not the typical flat Syrphid abdomen, and because Vespids fold their wings when they sit, the syrphid has the dark margin in front of the wing, so the wing looks dark and narrow, but the best thing are the antenna. Because wasps have the long black antenna and syrphids have just 3 segments, which they can not "stretch" so that they mimic wasp antenna, they use their front feet! You notice that the feet are black while most legs are yellow. In flight and sometimes while sitting these flies hold up their frontlegs next to their heads and it really looks like the antennae of a wasp! The larvae of these syrphids live in rotting trees and they are typical forest species.

This is a female Temnostoma, maybe T. balyras. Spilomyia looks similar, but has dots and bands on the eyes and a little tooth on the middle of the hind femur. But both like to pretend that they are dangerous wasps.