Description: WWT Knapp and Papermill Reserve Worcs. SO74925173 From Diptera info:- Post subject: Data sheet from National Review of Diptera, Falk, 1991Reply with quote Datasheet from the Review of Scarce and Threatened Diptera, Falk (1991). CHALCOSYRPHUS EUNOTUS (Loew) VULNERABLE DISTRIBUTION Only six known sites within the Welsh Borders and southern England: Knapp and Paper Mill N.R., Alfrick (1986 and 1987), Shrawley Wood, nr Stourport (1986 and 1987) and an unspecified site in the Wyre Forest (1971), all in Worcestershire; Cothill NNR, Berkshire (1953); Ledbury, Herefordshire (1899) and Bracketts Coppice, Dorset (1987). HABITAT Old broadleaved woodlands with streams. ECOLOGY Larvae probably develop in dead wood. Most records apply to adults sitting on partly submerged logs, strongly suggesting that the larvae live in semi-submerged wood. Adults recorded in May and June. STATUS Four post 1960 sites. It may prove to be more widespread along the Welsh borders with more thorough searching and the Dorset record is encouraging. This species is likely to remain vulnerable through the apparently specialised choice of breeding site. THREAT Unclear, but probably the clearance of old woodland sites and removal of dead wood, especially semi-submerged logs. MANAGEMENT Maintain known sites as broadleaved woodland, retaining any semi-submerged logs and ensure a continuity of dead wood in future by maximising the number of diseased and post mature trees. Date: 18 April 2017, 13:26. Source:
(Logjammer Hoverfly) Chalcosyrphus eunotus..Red Data Book Hoverfly, see notes. Author:
gailhampshire from Cradley, Malvern, U.K.
