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Rare Beetle Larvae Found in Wales!
9 Nov
Summary
- Rare short-necked oil beetle larvae discovered in Pembrokeshire.
- The Castlemartin Range is the beetle's only known Welsh habitat.
- Beetle relies on solitary bees for its life cycle completion.
In a significant development for conservation efforts, larvae of the rare short-necked oil beetle (Meloe brevicollis) have been discovered breeding in the Castlemartin Range, Pembrokeshire. This finding, confirmed by Natural Resources Wales in a report dated 28 October 2026, suggests the species is successfully reproducing at its only known surviving site in Wales. Previous surveys in 2022 and 2025 had only yielded dead adult beetles, raising concerns about the species' viability.
The short-necked oil beetle has a highly unusual life cycle, relying on solitary bees for the development of its larvae. After hatching, the beetle's larvae attach to bees, travel to their nests, and feed on pollen. This dependency means the beetle's survival is intricately linked to the health of bee populations and the availability of suitable habitats for both species.
The Castlemartin Range has been monitored as part of the Bumblebee Conservation Trust's Shrill Carder Bee project. The recent discovery of larvae provides optimism, indicating that the beetle's life cycle is continuing. Conservationists emphasize the importance of protecting this specific habitat, which includes bare earth patches, vegetation for shelter, and ample flowers, to support the beetle and the bees it depends on. This work is part of the wider Natur am Byth program aimed at species recovery in Wales.
