That's a clegg to a Scot, and very painful bite, too.
I never did understand just how such a large fly can land and start it meal without you feeling it.
General recognition feature for flying things.
If it parks its wings at 45 degrees (like the photo) and has big multifacet eyes; its some kind of fly (or maybe a F111 Aardvark)
If its wings fold along the body perfectly its from the bee/wasp/hornet family
This sometimes helps distinguish hoverflies which often mimic the colouring of bees and wasps
andrew
