Impressive sawfly noted on greater water parsnip on the Somerset Levels.
I know sawflies are very tricky to id, but does anyone have any idea which it may be?
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I agree it's an impressive-looking sawfly! Can't see what it could be other than a species of Tenthredo, but it doesn't quite match any of the ones I've seen before, so not sure what to make of it.
Entomologist and biological recorder
I've been doing a very unscientific trawl of Tenthredo pics and think that T. omissa is closest. But doubt I'll ever get further than a 'possible'
I asked Guy Knight of the sawfly recording scheme to look at this and he says:
"This looks like a female T. omissa. It is pretty uncommon species and a nice record but I think much more frequent in southern England than the old Benson key indicates."
So if you'd like to add T. omissa as an ID I'll agree with you!
It's good to get a more unusual species, especially since it's on a v. rare plant (greater water parsnip) that we're going to reintroduce into areas where its gone locally extinct - the plan being that it will help to reinvigorate pollen/nectaring insects populations.
It does look similar to T. scrophulariae, but that species has yellow antennae.
Lat/Lng: 51.07133, -2.90093
OS grid ref: ST369306