A decade ago, the greater Bermuda land snails, the only surviving population known, were found in an alley in Hamilton, the capital city, residing on concrete slabs near a dripping air conditioner. Presently, these native creatures seem to be thriving in their natural habitat once more. This success is attributed to the dedicated efforts of conservationists who bred over 10,000 snails in captivity and reintroduced them into protected wooded areas across the archipelago within the past seven years.
Katie Kelton, an invertebrate keeper at Chester Zoo in the UK, expressed excitement about the snails’ progress, stating that confirmed breeding and increasing numbers signify the project’s success. The collaborative initiative involving Chester Zoo, Biolinx Environmental Research based in Canada, and the Bermuda government has been instrumental in saving the species from extinction. A forthcoming report detailing the program’s achievements will be featured in the upcoming edition of Oryx, The International Journal of Conservation.
Despite the positive outcomes, the snails still face challenges from habitat destruction and invasive predators, factors that nearly eradicated them previously. The tiny snails, scientifically known as P. bermudensis, are crucial to Bermuda’s ecosystems. Despite their small size, they play a significant role in breaking down leaf litter, enriching the soil with nutrients, and providing a calcium source for their natural predators, aiding in the production of robust eggs.
The International Union for Conservation of Nature (IUCN) classifies P. bermudensis as critically endangered due to human encroachment on their habitat and the introduction of invasive predators. The successful reintroduction of the snails was commended by the IUCN during the recent Reverse The Red Day, dedicated to celebrating biodiversity conservation efforts.
Kelton acknowledged the challenges faced during the captive-breeding process, emphasizing the team’s dedication to learning about and conserving these snails. Timothy Pearce, curator of mollusks at Carnegie Museum of Natural History in Pittsburgh, highlighted the importance of such research for developing protocols for future conservation programs.
While the re-introduction of the snails to protected woodland sites has been successful, there are ongoing concerns about their long-term survival. Some re-introduced colonies have thrived, while others faced difficulties due to human presence and increased predation. Continued efforts are essential to safeguarding these snails, with stringent conservation measures in place to protect them from threats.
Kelton expressed pride in contributing to the preservation of these beloved snails, emphasizing the importance of giving this species a fighting chance despite their often-overlooked status in the natural world.