Resting - holding on with its mandibles
No interactions present.
It may have been infected with a fungus that makes insects hold on with there mouth parts and die.
Have a look in the web and here at:-
This is well-documented behaviour in Nomada, and I don't think Entomophthora has any part in it.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Doesn't this affect the Diptera primarily?
I have seen images of it on Hover Flies quite often. The behavior looked a bit like a symptom though.
this is how Nomada bees roost overnight, as they are cuckoo bees they don't have nests to go back to. Hoverflies don't hold on with their mandibles, they don't have mandibles.
Lat/Lng: 52.197924, -1.546727
OS grid ref: SP310556