Wasp or Diptera?
No interactions present.
You can tell this isn't a wasp by the shape of the antennae. Wasps always have longer segmented antennae. All hoverflies have short fly-like antennae, as this one does. It's a bit confusing with some of the midges, though. Some of their antennae are quite long.
I'm not an expert - so there's bound to be exceptions. But I've found it's worked quite well for me as a rule of thumb.
That's helpful thanks
it is a Sawfly-mimic
latest pics and diptera videos
Might still be sylvarum as "take care - the darkening may only be visible from certain points of view" according to Stubbs and Falk?? Be interested in everybody else's views?
a close-up of the dorsal view in the 2nd picture shows the inner mid tibia dark and I think it is like the one in this observation which I had to turn about in order to see the dark areas.
The lastest review is that in fact all three tibiae are all-yellow on X. xanthocnema and all three have some dark on them on sylvarum. So you really need a specimen or photos from every angle
Lat/Lng: 51.9, -2.9
OS grid ref: SO4330