The short version
- The glutinous snail, once common across Britain, now survives only in Llyn Tegid lake in Wales due to pollution and habitat loss.
- Ian Hughes and his family have bred approximately 2,000 individuals in a private garden facility after achieving a breakthrough in captive egg production.
- British zoos are receiving specimens to create insurance populations as part of a government-backed scheme aimed at future wild reintroductions.
A critical conservation effort is underway to prevent the extinction of the glutinous snail, a tiny mollusc that has vanished from most of its former range in the United Kingdom. Once widespread across British waters, the species is now confined to a single natural refuge: Llyn Tegid, the largest lake in Wales, located within Eryri National Park. Conservationists describe the creature as being as culturally and biologically significant as ancient artifacts, emphasizing the urgency of preserving what remains of this unique population.
The snail’s decline is attributed primarily to water pollution and the degradation of aquatic habitats over recent decades. These environmental pressures have driven the species to extinction in England, leaving the Welsh lake as its last known stronghold. The mollusc serves as an indicator of healthy freshwater ecosystems, feeding on algae and requiring clean, stable conditions to thrive. Its disappearance from other regions signals broader ecological challenges facing UK waterways.
Central to the current preservation strategy is Ian Hughes, a conservationist who has dedicated his career to protecting this threatened species. Operating under license from Natural Resources Wales since 2014, Hughes has conducted extensive fieldwork in Llyn Tegid, collecting specimens and studying their behavior. He has also installed small concrete shelters within the lake to provide safe havens for the snails in their natural environment, attempting to bolster survival rates amidst ongoing ecological stress.
A major breakthrough occurred when Hughes successfully bred the snails in a controlled setting at his home in Llanarth, Ceredigion. For years, the family maintained captive populations in homemade tanks, but it was not until recently that they observed egg production, a milestone never before achieved knowingly in captivity. This success allowed them to rear approximately 2,000 individuals, creating a substantial buffer against total loss. The achievement marked a turning point in the effort to secure the species' future.
The Hughes family has become deeply involved in the project, with Ian’s wife Kerry and their three sons participating in the labor-intensive work. This includes wading into the freezing waters of Llyn Tegid during winter months to collect specimens and maintain equipment. The family views their efforts as essential to maintaining ecological balance, noting that every species plays a vital role in the broader ecosystem. Their commitment has transformed what began as a personal mission into a structured conservation operation.
To further safeguard the species, Hughes is collaborating with the British and Irish Association of Zoos and Aquariums (BIAZA) to establish ark populations across several wildlife parks. Institutions including Wingham Wildlife Park in Kent, Askham Bryan Wildlife Park in York, Longleat in Wiltshire, and Dudley and Chester zoos are receiving specimens from the Hughes facility. These captive groups will serve as insurance against extinction while researchers study the snails’ ecology, husbandry requirements, and genetic diversity.
The ultimate goal of this initiative is to reintroduce the glutinous snail into suitable wild habitats outside of Llyn Tegid. The Freshwater Habitats Trust is currently identifying appropriate water bodies for potential release sites. BIAZA officials have expressed optimism that reintroduction could occur within three years, provided research yields sufficient understanding of the species’ needs. This effort is supported by a £60 million UK government scheme designed to protect rare and endangered species.
Local authorities and park rangers have voiced strong support for the project, highlighting its significance for regional biodiversity. Simon Jones, an assistant warden at Eryri National Park, described the initiative as a source of pride for the area, which hosts this unique species. As the program moves forward, the focus remains on gathering data to ensure that any future releases are scientifically sound and ecologically viable, balancing hope with rigorous conservation standards.
Sources behind this briefing
Go to the original reporting
- BBC Science & Environment↗Battle to save the tiny, gooey snail only found in one lake in the UK
