Mottled Bee-fly (Thyridanthrax fenestratus)
Key Details
| Taxonomic Groups: | Invertebrate > insect - true fly (Diptera) > Soldier fly or ally |
| Red List Status: | Least Concern (Not Relevant) [LC(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: | Thyridanthrax fenestratus |
| UKSI Recommended Authority: | (Fallén, 1814) |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Drake, 2017 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | No |
| Justification: | S41 but LC and hundreds of records in it's historical locations |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | No |
| Justification: | Populations appear to be stable in their known localities within Dorset, Surrey, South and North Hampshire |
| 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: | Prevention of human disturbance to sensitive areas and prevention of scrub and tree encroachment leading to loss of suitable nesting sites for A. pubescens would benefit both species and maintain the overall viability of the areas concerned for established flora/fauna. The adults feed from flowering plants which may be scarce so increasing areas of these may be useful. |
Species Assessment
Not relevant as no Key Actions defined.
Key Actions
No Key Actions Defined
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.