Sphegina verecunda Collin, 1937
Biology & ecology:
The larva has been found in the exudates from a sap run on Elm Ulmus. It is found in wet shady situations in woodland and carr. Adults are found in shade, or dappled sunshine, usually close to wet areas or streams, and are occasionally found visiting flowers.
This is the scarcest member of the genus, with scattered records in the southern half of Britain, but a marked increase in frequency westwards. There are a few records from northern England and Scotland.
Status & conservation:
The frequency of occurrence has fluctuated considerably, but there is no obvious long-term trend.