Cheilosia chrysocoma (Meigen, 1822)
Biology & ecology:
The larva of this species remains unknown, but egg laying has been observed on Wild Angelica Angelica sylvestris in Europe (Doczkal, 1996). Adults are typically found sitting on paths, sunning on vegetation or occasionally at flowers such as sallows Salix sp. catkins, in woodland rides, glades or edges. There are indications that calcareous marshy areas are preferred but records are not exclusively from such habitats.
There are several obvious hot spots for this species, including parts of Oxfordshire, the limestone west and north of Peterborough, the Welsh borders and scattered localities in north and south Wales. There is also a hotspot in south Cumbria. In Scotland records are widely dispersed and form no obvious pattern.
Status & conservation:
There has been a decline in occurrence, especially in southern England, but there is some evidence of a recent upturn north of a line from the Thames to the Severn. This is a very striking insect and consequently it is more likely to be reported than other members of the Cheilosini. Therefore problems with changing recorder effort may be a less significant factor behind the downward trend.