Taken on 18th June 2007, Lincoln UK. This was in my garden, this is the male.
A female, taken on 13th July 2008. Resting briefly on Sedum 'Frosty Morn'. Triangular shapes on side of abdomen, dusted bluish is diagnostic. Thanks to Paul of diptera.info.
The back of the female.
On 21st July, a female feeding on Geranium versicolor. They don't sit, but move very quickly like a bee.