Quite numerous in mixed scrub of alder, beech, larch and ash. I don't know if identification will be possible from this shot.
No interactions present.
They are very shiny as far is i can remember. I have old photos from last year. Perhaps i had better have a dig for them...
It was older than last year but that did not stop me locating the observation i never put on.
I was testing the camera and just took a few wide angle images of the swarm and never did any close ups. I was just curious as to why they were all in one place.
to both for the identifications. I'm no expert, and both seem reasonable. Hopefully there will be a few "votes" from others to help decide.
Green bottle / greenbottle is the common name that covers quite a few different species in various genera and families that all look green and shiny. The best known are Lucilia spp. - family Calliphoridae. The ones posted here are definitely not Gymnochaeta/Gymocheta which are bristly parasite flies (Tachinidae) and have quite a distinctive appearance when you know them. I'm no great expert on flies but had some shots I took of flies that seem a perfect match for the ones posted here and was given the reasons for the ID coming out as family Muscidae (by the wing veins) and as species Eudasyphora cyanella on a specialist fly site: http://diptera.info/forum/viewthread.php?thread_id=28651&pid=127717
Nick Upton, naturalist and photographer.
Lat/Lng: 54.6215, -1.2545
OS grid ref: NZ482254