Nuptual flight of Eristalis nemorum
A small drone-fly and quite similar to E. arbustorum (the dwarf drone-fly). The small but crisp dark patch on the front edge of the wings (called a stigma) helps to identify this species. It also has a clean and relatively thin black stripe down its face.
It can be found in a wide range of open habitats such as meadows, gardens and wasteland.
When to see it
It can be seen from April to October, peaking in July and August.
Larvae have been found in farmyard drains and other similarly enriched situations…. Naturespot