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Cheilosia nigripes

 
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

PostPosted: Sat May 28, 2005 5:39 pm    Post subject: Cheilosia nigripes Reply with quote

Cheilosia nigripes (Meigen, 1822)

Identification ease/difficulty: 3

StatusSources of information
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

PostPosted: Sun May 29, 2005 8:40 am    Post subject: Species account from the Provisional atlas Reply with quote

Species account from Provisional atlas of British hoverflies, Ball & Morris, 2000.

Cheilosia nigripes (Meigen, 1822)

Biology: The larvae of this species remain unknown. Adults are usually found on flowers in woodland rides and edges on calcareous soils. Mainly recorded from wooded tracks on chalk downland where they fly low amongst the vegetation. Males can sometimes also be found in large numbers basking on sunlit leaves

Distribution: This is not an uncommon species within its very restricted range on the chalk downs of south-east England, especially in Surrey, Sussex and Hampshire. There are also a few records, both old and recent, from the limestone in Gloucestershire and Somerset
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stuart
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Joined: 11 May 2005
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Location: Peterborough, UK

PostPosted: Sun May 29, 2005 9:09 am    Post subject: Data sheet from National Review of Diptera, Falk, 1991 Reply with quote

Datasheet from the Review of Scarce and Threatened Diptera, Falk (1991).

CHEILOSIA NIGRIPES (Meigen) RARE

DISTRIBUTION Authentic specimens are known from about a dozen sites in the chalk areas of southern England (Hampshire, Sussex, Surrey, Oxfordshire), and a record from Gloucestershire on Cotswold limestone is probably also correct. There is also a record in the London area of Kent in a district apparently without calcareous soils.

HABITAT Broadleaved woodland on chalk and occasionally limestone. In particular woodland edges, glades or adjacent damp meadows are favoured.

ECOLOGY Larvae probably phytophagous, though host plant unknown and not easily predicted. Probably a small herb of chalk woodlands. Adults recorded from late May to mid June and may be found sunbathing on foliage or visiting buttercups.

STATUS Very local with some six known post 1960 sites: Ashford Hill, Hampshire (1979 1987); West Dean Woods, Sussex (1980); Headley (1965), White Downs (1985) and Box Hill (a comparatively strong colony with a number of recent records), Surrey; Blackheath, Kent (1961, 1964).

THREAT Loss of suitable habitat to agriculture and intensive forestry. Mis-management of sites with a loss of a rich ground flora (for example through sycamore invasion or shading out of rides and clearings). Recreational pressures at sites such as Box Hill.

MANAGEMENT Maintain open rides and clearings in woods; coppicing could be useful in encouraging floristic richness and diversity. Woodland edge meadows are known to be important on some sites, these need to remain unimproved, with Rananculus among a rich flora, and whilst the exact requirements are unclear there has tended to be little management or a late autumn cut.
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