Essex Field Club on Facebook

Visit Our Centre

EFC Centre at Wat Tyler Country ParkOur centre is available for visits on a pre-booked basis on Wednesdays between 10am - 4pm. The Club’s activities and displays are also usually open to the public on the first Saturday of the month 11am - 4pm.

About us


Video about the Club Essex Field Club video

registered charity
no 1113963
HLF Logo A-Z Page Index

Species Account for Nysson dimidiatus

previous species | next species

Nysson dimidiatus  Jurine, 1807
Small Spurred Digger Wasp
Aculeata: Crabronidae

 
Maps produced by MapMate®. Data overlays Copyright © Essex Field Club 2024.
Reproduction for study and non-profit use permitted, all other rights reserved.

Taxonomic group: bees and wasps (Aculeata) - County data

Why not become a member

View time series maps for Nysson dimidiatus

Missing records?

member log-on for taxon report




Status: Nb

Essex RDB: Listed
Threat: Essex Threatened
Records: 36
First Record: 1996
Latest Record: 2012

1992-on hectads: 8
Pre-1992 hectads: 0
Total hectads: 8

Additional Phenology Data

Images

sorry, no pictures available for this species yet - if you have an image please upload it

   
 
Please report any problems with this record:
VC error
GR error
Taxon ID suspect
Structural habitat suspect
Other problems, please explain here:


 

Essex Red Data List comment
cleptoparasite on Gorytes tumidus

Species text
Nysson dimidiatus has records from scattered localities throughout England and Wales as far north as Northumberland but it is a very local species with about 25 known post-1970 sites. Both N. dimidiatus and its host are likely to have declined during this century, in response to the loss and deterioration of sandy habitats such as heathland, and from coastal development. This species and its main host favour warm sunny areas, especially south-facing slopes in sheltered spots, where the host excavates its nests in bare and sparsely vegetated ground. It is a cleptoparasite of the local sphecid wasp Harpactus (Gorytes) tumidus, with which it is usually taken and closely resembles. Scrub invasion and the loss of bare sand has resulted from changes in land use and the decline in rabbit populations following the introduction of myxomatosis. At some sites, horse riding and motorcycle activity could jeopardise the future of the species, though at others some disturbance will probably be beneficial in promoting the presence of bare and sparsely vegetated ground. References

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

Habitats

Broad Habitat Data (based on 23 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 27 records with structural habitat information)

Habitat Detail and Method (based on 36 records with habitat detail and method information)

Recorded management for locations with Nysson dimidiatus

Recorded substrate and hydrology for locations with Nysson dimidiatus

Why not join the Club, register and add a new species page
Interpretation of distribution maps