Didea fasciata Macquart, 1834
Biology & ecology:
The larva is aphidophagous and arboreal on both coniferous and deciduous trees. Adults are generally found in or near woodland, including conifer plantations and scrub, where the males aggressively defend sun-lit patches. Typical localities include rides and clearings and tracks through trees.
Widespread throughout Britain. Whilst listed by Stubbs (1982) as a ?good? primary woodland indicator, records submitted to the recording scheme suggest that it occurs in woodlands of all types, including conifer plantations, secondary woodland and scrub.
Status & conservation:
There has been a significant decline in occurrence from most parts of Britain over the past 35 years, but occurrence in uplands appears to be increasing. There has also been a lot of effort put into upland areas in recent years and the data may be skewed as a result.