Platycheirus ramsarensis Goeldlin, Maibach & Speight, 1990
Biology & ecology:
Larva unknown. This species was split from P. clypeatus by Speight & Goeldlin (1990) and Goeldlin et al. (1990). It has been found in oligotrophic, wet situations beside moorland streams and lakes, usually where there are small flushes with abundant Carex or Juncus. sedges Carex sp. or rushes Juncus sp. Adults fly low down amongst stands of vegetation and will visit flowers such as Marsh Marigolds Caltha palustris
This is a widely distributed upland species which occurs in acid situations such as boggy stream valleys. The majority of records are from Scotland, the Pennines and Wales, with a scatter from south-western England.
Status & conservation:
The frequency of occurrence plot is for 'Platycheirus clypeatus sensu lat.', i.e. including P. occultus, P. europaeus and P. ramsarensis. The trend for this complex shows a small but significant decline, although the number of records of this species has increased rapidly since it was recognised in 1991.