Grammotaulius nitidus
Key Details
| Taxonomic Groups: | Invertebrate > insect - caddis fly (Trichoptera) > Caddisfly |
| 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: | Grammotaulius nitidus |
| UKSI Recommended Authority: | (Müller, 1764) |
| 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 status awarded due to few modern sites, but it might be in good numbers at some of them. Many losses seem to have happened a long time ago and be due to major habitat destruction. Lack of knowledge of the breeding habitat means that its survival should not be left to chance. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | Detailed habitat needs not known. Larvae never found in this country and only once abroad. It may be found to have a very specific need that could be addressed by focussed conservation in the future. |
| 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: | It seems to benefit from large-scale reed bed creation and within its general area of distribution be mobile and probably capable of colonisation. It seems that even in absence of detailed microhabitat knowledge that standard management of reed bed creation and expansion will help the species so is not species-specific but that could change once the microhabitats are known. |
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: | Lack of basic biological information means it is impossible to specify conservation requirements and it may anyway be benefitting incidentally from actions for other species and not need any specific action. The proposed action is to try and get more basic information so that an informed decision can be made as to its needs. |
Key Actions
Key Action 1
Proposed Action: Locate larvae at Wicken Fen and accurately describe habitat in terms of vegetation size and extent of seasonal drying out.
Action targets: 4. Autecology and pressures understood
Action type: Targeted monitoring
Duration: 2 years
Scale of Implementation: 1 site
High priority sites: Wicken Fen, Woodwalton Fen
Comments: It is very difficult to survey many large reed swamps so Wicken has been selected but sites such as Woodwalton Fen and Benacre Broad also deserve consideration.
Key Action 2
Proposed Action: When larvae are found due to Action 1 then look for them and their habitat at other sites.
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 2 years
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.