Summary for Euophrys petrensis (Araneae)

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National Distribution

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Euophrys petrensis male MW Copyright: Michael Waite
Identification difficulty rating: 3
Name: Euophrys petrensis
Authority: C.L.Koch, 1837
Order: Arachnida: Araneae
Family: Salticidae
National Rarity status: NR
IUCN status: NT, criteria: B2ab(ii,iv)

Records: 127
First Record: 1890
Latest Record: 2022

1992-on hectads: 15
Pre-1992 hectads: 28
Total hectads: 37

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About this species

Recorded altitude range
1m to 280m

Species text

Apart from an old record from Cumberland, and recent records from North Yorkshire, Rum and Wigtownshire, the species is confined to the south of England. It is widespread in western and central Europe.

Habitat and ecology
T. petrensis occurs on dry heathland, reaching highest densities between about 7 and 12 years after fire. It may colonise small burnt areas in the first year or two, but may take 4 or 5 years to become established on large burnt areas where there is not an adjacent source of immigrants, suggesting that its powers of dispersal are rather poor. It is usually active in sunshine on bare stony areas, but is also able to live among older heather. The spider is also found under stones on mountains in the north. Males are adult from late April to July with a peak of activity in late May and early June, females are adult from late March to July.

The spider is common on some heathland sites, but rather local. It has been recorded from only eight locations post-1992. Area of occupancy has declined by 68% from 25 hectads before 1992 to just eight hectads after that date.

The loss of heathland to agriculture, afforestation and development. This species appears to be slow to spread to large expanses of burnt heathland.

Management and conservation
Maintain all seral stages of heather by rotational management of fairly small areas.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

Adult Season Data (based on 41 records with adult season information)


background methodology

Broad Habitat Data (based on 40 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 7 records with structural habitat information)

Habitat Detail and Method (based on 16 records with habitat detail and method information)

Recorded management for locations with Euophrys petrensis

Recorded substrate and hydrology for locations with Euophrys petrensis


Euophrys petrensis male MW 02
Euophrys petrensis male MW 02
Euophrys petrensis male MW
Euophrys petrensis male MW
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