Cheilosia pubera (Zetterstedt, 1838)
Biology & ecology:
The larva feeds on the roots of Water Avens Geum rivale. Adults have been found at Caltha flowers, but are more frequently found sunning on leaves at scrub edges, in wet pasture, fen edges and lake shores. They fly low over the vegetation in grassy, open areas often along streams or other wet edges. The best way of finding this species is to identify localities with large populations of the host plant.
Although there are scattered records from southern and western England, this species is primarily a northern species that is possibly under-recorded. Where it occurs, it can be extremely abundant.
Status & conservation:
Although the frequency of occurrence shows a small (and non-significant) downward trend, it has been recorded from more hectads in recent years. Recorded from 59 hectads since 1985.