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Cauchas rufimitrella
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Essex Field Club
Essex Field Club
registered charity
no 1113963
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We are normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday between 11am and 4pm. We are also usually open on Wednesdays between 10am and 4pm.

Spring recording Record your Robin Record Common Frog Rana temporaria
Record Alexanders Smyrnium olusatrum Record Tawny Mining Bee Andrena fulva
Record Dark-edged Bee Fly Bombylius major
Record Spring Flower Bee Anthophora plumipes
Record cuckoo bee Melecta albifrons

Species Account for Cryptonevra nigritarsis

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Cryptonevra nigritarsis  (Duda, 1933)
Diptera: other groups: Chloropidae

 
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National status: Scarce



Additional Phenology Data

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Taxonomic group: flies (other) (Diptera: other groups) - County data   
 
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Essex Red Data List comment
Recorded from 4 out of 57x10km.sq. records in county

Species text
Cryptonevra nigritarsis is a poorly known species, and probably under-recorded to some extent. There are over ten post-1960 sites. Although known from few sites it will probably prove to be more widespread; unlike related species it is often recorded from single specimens. It is probably most easily recorded by collecting damaged Phragmites stems and rearing adults. The fly occurs in Phragmites stands, usually those with a saline influence (but also inland fens such as Wicken (Cambridgeshire) and the Cothill fens (Oxfordshire). Most sites are coastal and an inland Yorkshire site has had saline flooding in the past. Management should maintain a reasonably high water level in wetlands and ensure good stands of Phragmites. Use rotational ditch or pond management to maintain continuity of suitable habitat and prevent the natural silting up of water bodies, but avoid dredging the whole bank at once so as to preserve continuity of Phragmites stands (Ismay, status review in prep.). References

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Habitats

Broad Habitat Data (based on 2 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 1 records with structural habitat information)

Habitat Detail and Method (based on 1 records with habitat detail and method information)

Recorded management for locations with Cryptonevra nigritarsis

Recorded substrate and hydrology for locations with Cryptonevra nigritarsis

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