The successful release of over 1,300 pea-sized snails marks a crucial step in the recovery of two species thought to be extinct, showcasing the impact of dedicated conservation efforts.
1,329 Critically Endangered Snails Return to Their Wild Home
1,329 Critically Endangered Snails Return to Their Wild Home
Harnessing conservation science, Chester Zoo plays a significant role in reestablishing native snail populations on the remote Desertas Islands.
In a remarkable conservation initiative, 1,329 tiny, critically endangered snails have been released on a remote Atlantic island, restoring two species native to Desertas Island that had been presumed extinct for a century. The reintroduction comes after conservationists discovered a small population of these snails surviving precariously on the rocky cliffs of Deserta Grande island, close to Madeira.
After realizing the dire state of these unique molluscs, found only in this geographic location, conservationists in 2012 initiated efforts to safeguard the species from invasive predators such as rats, mice, and goats that threaten their existence. A rescue mission culminated in bringing the last 200 individuals to various zoos in the UK and France, including Chester Zoo, where specialized care was developed for them in converted shipping containers.
At Chester Zoo, the conservation science team adapted habitat conditions to nurture the snails, ensuring that they received the necessary food and environment to thrive. Their efforts proved successful, yielding 1,329 offspring, which were meticulously marked with colour-coded identification dots — a method using non-toxic markers visible under ultraviolet light. This innovative marking enables researchers to monitor their growth, dispersal patterns, survival rates, and adaptation to their newfound home.
Gerardo Garcia from Chester Zoo heralded the reintroduction as a significant milestone in the species' recovery plan. The restored natural habitat on Bugio, a neighboring island where invasive species have been eradicated, provides a safe haven for these snails. "If all goes according to plan, we hope to see more snails released next spring," Garcia said.
Heather Prince from Chester Zoo emphasized the ecological significance of these snails. "They are crucial for the island’s ecosystem, as they contribute to breaking down organic matter and returning essential nutrients to the soil, ultimately supporting plant growth," she explained. The successful release not only breathes new life into the species but also highlights the essential role that often-overlooked fauna play in maintaining ecological balance.
