Pardosa trailli
Key Details
| Taxonomic Groups: | Invertebrate > spider (Araneae) > Spider |
| Red List Status: | Vulnerable (Not Relevant) [VU(nr)] |
| D5 Status: | Included in the baseline Red List Index for England (Wilkins, Wilson & Brown, 2022) |
| Section 41 Status: | (not listed) |
| Taxa Included Synonym: | (none) |
| UKSI Recommended Name: | Pardosa trailli |
| UKSI Recommended Authority: | (O.P.-Cambridge, 1873) |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Harvey et al., 2017 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | VU, criteria: B2ab(ii,iv): qualifies as RE in England (not seen since 1948) but still present on scree/stony ground in the mountains of N/W Wales and Scotland, which have the majority of recorded hectads. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | No apparent loss of suitable scree habitat in former Lake District stronghold. The least susceptible to climate change of England's montane species, occurring to relatively low altitude. |
| Question 3: | At a landscape scale, would the species benefit from untargeted habitat management to increase habitat mosaics, structural diversity, or particular successional stages? |
| Response: | No |
| Justification: | This species would not benefit from untargeted management |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 2. Biological status assessment exists |
| Recovery potential/expectation: | Low - Relict or natural rarity |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | Montane, natural scree specialist which is very active in sunshine but hides in poor weather. Relatively easily identifiable in the field. |
Key Actions
Key Action 1
Proposed Action: Targeted survey of all recorded sites and similar nearby habitat using standardised methodology to assess current status (and establish baseline for national monitoring programme)
Action targets: 2. Biological status assessment exists
Action type: Status survey/review
Duration: 2 years
Scale of Implementation: ≤ 5 sites
High priority sites: Grasmoor, Great Gable, Wasdale and Sty Head, Cumbria
Comments: Survey needs to coincide with May/June adult season. No other actions appropriate unless re-found in England.
Acknowledgment:
Data used on this website are adapted from Threatened species recovery actions 2025 baseline (JP065): Technical report and spreadsheet user guide (Natural England, 2025). Available here.