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Colias croceus
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Species Account for Dioctria oelandica

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Dioctria oelandica  (Linnaeus, 1758)
Diptera: Larger Brachycera: Asilidae

 
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Essex RDB: Listed
Threat: Essex Unknown

Records: 2
First Record: 1898
Latest Record: 1995

1992-on hectads: 1
Pre-1992 hectads: 1
Total hectads: 2
Additional Phenology Data

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Taxonomic group: soldier flies and allies (Diptera: Larger Brachycera) - County data   
 
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Species text
This is a striking robber fly with strongly brown or purple tinged wings. It is widely dispersed in England, Wales and as far north as Perthshire in Scotland, predominating in southern England. Falk (1991a) describes it as a very local and declined species with about 25 post 1960 sites, and the New Forest as a stronghold. Stubbs & Drake (2001) note that the species seems to be strongly associated with oak forest, occurring in the warmer southern forests, but easiest to find in the valley oak woods of south-west England. Two records exist for Essex: Colchester (1898) and Chafford Hundred (1995). There must be some doubt about the Chafford Hundred record, since neither its national status nor significance in Essex terms are recognised in Tattersfield et al. suggesting that there may have been a transpositional error. References

Species text last edited on Tue Mar 20th 2007 by user 3

Habitats

no broad habitat data available

no subhabitat data available

no structural habitat data available

Habitat Detail and Method (based on 2 records with habitat detail and method information)

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