Dog Screw-moss (Tortula canescens)
Key Details
| Taxonomic Groups: | Non-vascular plant (incl. chromists) > moss > Moss |
| Red List Status: | Endangered (Not Relevant) [EN(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: | Tortula canescens |
| UKSI Recommended Authority: | Mont. |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Callaghan, 2023 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | At risk of extinction in England due to small population size |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | A species with low recovery potential where the main aim is to maintain/protect populations |
| 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: | The species has a restricted distribution and so is unlikely to benefit from untargeted actions |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 3. National Monitoring Plan agreed and implemented |
| Recovery potential/expectation: | Low - Relict or natural rarity |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | GB RL criteria: D1. Mediterranean Oceanic species. |
Key Actions
Key Action 1
Proposed Action: Develop and implement national monitoring plan to ensure comprehensive and up-to-date information is available on range size, population size, occupied sites and threatening factors in England
Action targets: 3. National Monitoring Plan agreed and implemented
Action type: Targeted monitoring
Duration: 1 year
Scale of Implementation: ≤ 20 sites
High priority sites:
Comments: A species with low recovery potential where the main aim is to maintain/protect populations
Key Action 2
Proposed Action: In consultation with landowners, assess habitat management requirements at surviving locations and produce a costed plan for any new actions required
Action targets: 5. Remedial action identified
Action type: Advice & support
Duration: 1 year
Scale of Implementation: ≤ 20 sites
High priority sites:
Comments: Measures to restore habitat at Talland Barton Farm were agreed with the landowner (National Trust) in 2021, but there has been no subsequent monitoring. Habitat management on The Lizard is presently favourable. What new habitat management may be required at other sites is unknown due to inadequate monitoring.
Key Action 3
Proposed Action: Undertake research to better understand the ecology and habitat requirements of the species.
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 1 year
Scale of Implementation: National
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.