Dasysyrphus albostriatus (Fallén, 1817)
Syrphus albostriatus Fallén in Coe (1953).
Biology & ecology:
The larva is aphidophagous and arboreal, occurring on both conifers and broadleaved trees. They feed nocturnally, resting near the aphid colony by day on twigs and branches, where they are superbly camouflaged by their dark colours and body projections. Adults are usually found near trees in situations such as woodland rides and edges, hedgerows and gardens where they can be found visiting flowers, such as white umbels and yellow composites, or settled on sun-lit vegetation.
Extremely widely distributed, mainly occurring in wooded districts. In more northerly areas it is clearly more abundant in lowland and coastal environments. Records extend north as far as Sutherland.
Status & conservation:
The frequency of recording is very variable with a slight (but not significant) downward trend.