Clubiona juvenis
Key Details
| Taxonomic Groups: | Invertebrate > spider (Araneae) > Spider |
| Red List Status: | Near Threatened (Not Relevant) [NT(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: | Clubiona juvenis |
| UKSI Recommended Authority: | Simon, 1878 |
| 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: | NT, criteria: B2a: little change since 2017 review. Restricted to E. Anglia and Studland area, Dorset. No current evidence of decrease but the hydrological vulnerability of its fen and reedbed sites in E. Anglia justifies conservation action. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | Absent from much apparently suitable habitat |
| 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: | Unknown |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | Found in reedbeds (including brackish) and tall fen vegetation with Sphagnum beneath |
Key Actions
Key Action 1
Proposed Action: Targeted re-survey of recorded, nearby and other suitable sites, 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: ≤ 20 sites
High priority sites: Studland Bay area former sites
Comments: All sites need re-survey but apparent loses in Dorset since early 1960s, particularly need confirmation. In E. Anglia many sites can be combined with Centromerus semiater survey.
Key Action 2
Proposed Action: Autecological research to better characterise habitat requirements and inform management
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 3-5 years
Scale of Implementation: ≤ 5 sites
High priority sites: Chippenham Fen, Cambs; South Haven Flats Marsh, Studland, Dorset
Comments: Focus on reliable and contrasting sites
Key Action 3
Proposed Action: Ensure site managers are aware of species past/recent presence and vulnerability on their sites. Update them with Action 1 and 2 results to provide any resulting guidance on locations/management and inform commissioning of invertebrate survey work (methods likely to detect/damage species, need for retention and examination of spider by-catch when not a survey target)
Action targets: 5. Remedial action identified
Action type: Advice & support
Duration: >10 years
Scale of Implementation: ≤ 20 sites
High priority sites:
Comments: Assemble mailing list and update site managers at species-appropriate intervals; most easily delivered by BAS/SRS.
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.