Erotesis baltica
Key Details
| Taxonomic Groups: | Invertebrate > insect - caddis fly (Trichoptera) > Caddisfly |
| 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: | Erotesis baltica |
| UKSI Recommended Authority: | McLachlan, 1877 |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Wallace, 2016 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | IUCN Vulnerable status awarded due to small number of modern records and an apparent loss of sites. There are two Welsh sites but the remainder are all English. There are few enough sites and in a habitat that naturally changes so its survival probably cannot be left to chance. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | The importance of the submerged root habitat may be overlooked and needs specifically emphasising for this species. |
| 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: | Yes |
| Justification: | Fen creation is often part of many mosaics and this species probably benefits if that is prevented from becoming over mature. |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 2. Biological status assessment exists |
| Recovery potential/expectation: | Medium-high |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | The habitats used are permanently wet open shallow fen and the roots of marginal vegetation of dykes and ditches in fens. The wet open shallow fen can dry out, (but the species survived that happening at Cors Goch, Anglesey). The roots resource of marginal vegetation of dykes and ditches in fens is damaged by work that digs out both sides of a channel. |
Key Actions
Key Action 1
Proposed Action: Revisit some sites from which there are no post 1980 records. Finding additional modern sites reduces risk of extinction from loss of sites. Target sites are sites are Chippenham Fen and Wicken Fen and also Strumpshaw and Surlingham Fens south of the Yare where it has not been found despite it being common in the north Broads.
Action targets: 3. National Monitoring Plan agreed and implemented
Action type: Targeted monitoring
Duration: 2 years
Scale of Implementation: ≤ 5 sites
High priority sites: Chippenham Fen, Wicken Fen, Strumpshaw Fen
Comments: One visit per site would probably suffice
Key Action 2
Proposed Action: Inform land managers of sites for this species, advise on appropriate management for the species and ensure that the root habitat is mentioned on site management plans.
Action targets: 3. National Monitoring Plan agreed and implemented
Action type: Advice & support
Duration: 1 year
Scale of Implementation: ≤ 5 sites
High priority sites:
Comments:
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.