About 7.5 mm long, very activly searching on bramble leaves (for prey?).
No interactions present.
It certainly didn't act like a hoverfly and was very reminiscent of a wasp species 'on the hunt'.
Was it looking for prey?
Xylota sylvarum acts in this way, mimicking solitary wasps in the way that it runs across leaves and logs in a jerky, fast manner.
However, they do not catch prey, they just feed off pollen and other items which they pick up from the surface of leaves. Morris, in the Hoverflies of Surrey, records it as feeding at Hemlock Water Dropwort and Ground-elder, too.
It is a really striking hoverfly, which I do not see much...shall be looking out for them over the next couple of weeks.
My Flickr photos...
It was such a brief encounter that I was sure that I was seeing a wasp - perhaps time to change the specs!
All solitary wasps have 2 pairs of wings and much longer antennae than this. Despite the fact that Xylota spp. are remarkably good wasp mimics, they have not mastered the art of making 3 segments look like 12 or more (as with all dipteran mimics of aculeates).
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Perhaps I ought to stick to centipedes, millipedes etc..........
Lat/Lng: 51.249, -0.3111
OS grid ref: TQ179513