I've no idea what these are, and they are far to quick for me to get a decent shot.
there are about a couple of hundred of these flying at ground level in my garden.
if anyone knows the ID would be welcomed Thanks
The St Mark's fly is small, black and shiny. It is so-called because it emerges around St Mark's Day, April 25th. Large numbers of adults can be found in woodland edges, hedgerows, fields and wetlands.
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