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Species Account for Eutolmus rufibarbis

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Eutolmus rufibarbis  (Meigen, 1820)
Diptera: Larger Brachycera: Asilidae

Eutolmus rufibarbis

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Essex RDB: Listed
Threat: Essex Endangered

Records: 3
First Record: 1994
Latest Record: 2014

1992-on hectads: 1
Pre-1992 hectads: 0
Total hectads: 1
Additional Phenology Data


Eutolmus rufibarbis
Eutolmus rufibarbis

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Taxonomic group: soldier flies and allies (Diptera: Larger Brachycera) - County data   
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Species text
The large robber fly Eutolmus rufibarbis is a rare southern species with strongholds in the Breck districts of East Anglia and the heaths of Surrey and West Sussex. Falk (1991a) states that there are only 20 known post 1960 sites, mainly within the Brecks and West Sussex Heaths, with only two recent records for Surrey. In Essex the only record was of a single female found in 1994 on the southwestern edge of Mill Wood, where it was probably looking for an ovipositation site. There is an old (pre-1970) record shown in Drake (1991) for north Kent at TQ56, suggesting that a population may have been present in the region, at least in the past. Shirt (1987) notes that the species is confined to large blocks of open dry heathland, an especially vulnerable habitat. Adults are predatory upon other insects and the eggs are apparently laid within incisions cut by the female ovipositor in herbage, though larval development probably occurs in sandy soil. In 1994 there were extensive sandy grasslands across much of the Mill Wood Pit area, providing both hunting and nesting habitat. However the area was virtually all developed for housing and the amount of suitable habitat present both in Chafford Hundred and elsewhere in the region was thought to too small to support this species, which was assumed to be extinct in the county. Remarkably, in 2014 a male and female were found in almost the same location as the first 1994 female, so it seems that a small population has hung on in the small habitat area remaining. References

Species text last edited on Tue Aug 27th 2019 by user 3


Broad Habitat Data (based on 3 records with habitat information)

no subhabitat data available

no structural habitat data available

Habitat Detail and Method (based on 3 records with habitat detail and method information)

Recorded management for locations with Eutolmus rufibarbis

Recorded substrate and hydrology for locations with Eutolmus rufibarbis

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