Summary for Rugathodes instabilis (Araneae)
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About this speciesRecorded altitude range
1m to 301m
The species is widespread in East Anglia and south-eastern England but is much more locally distributed elsewhere in southern Britain. It is apparently absent north of Derbyshire although the county distribution map in Locket et al. (1974) extends the range as far north as Cumbria. Apart from Sweden, where it is included in their Red List (Gärdenfors 2000) the spider is absent from Scandinavia, but otherwise widespread in north-western and central Europe.
Habitat and ecology
This species builds its webs on low vegetation in wetland habitats including saltmarsh, reed fen, sedge marsh and carr woodland. Both sexes are mature from early to mid-summer with females recorded into the autumn.
Generally uncommon but most frequent in south-eastern England. There has been no recent decline in this species.
Drainage and degradation of wetland habitats.
Management and conservation
Ensure wetlands are not drained for agriculture or other land-use.
Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.). References
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