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Written off as extinct, a tiny mollusk makes a colossol comeback thanks to a decade of relentless conservation science and international cooperation.

It was supposed to be gone forever. The greater Bermuda snail, a button-sized marvel of evolution, had been written off as a casualty of the modern world—another victim of invasive species and habitat destruction. But in a damp alleyway in Hamilton and a high-tech lab in Chester, a miracle was engineered.
Today, the species has been officially declared "safe from extinction," a designation that marks one of the most remarkable comebacks in conservation history. From a remnant population found clinging to life in an overgrown city alley in 2014, scientists have bred and released over 100,000 of these mollusks back into the wild. It is a triumph of patience, science, and the stubborn refusal to let a species fade into the fossil record.
The rescue mission was a trans-Atlantic operation. Chester Zoo in the UK became the "ark" for the species, where keepers developed specialized pods to mimic the humid, subtropical conditions of Bermuda. "It’s every conservationist’s dream to help save a whole species," said Tamás Papp, the invertebrates assistant team manager at the zoo. For years, the team meticulously bred the snails, shielding them from the carnivorous "wolf snails" and flatworms that had decimated their ancestors.
The reintroduction process has been surgical. Since 2019, thousands of snails have been flown back to Bermuda and placed on protected islands with strict biosecurity measures. These "sanctuary islands" act as fortresses, allowing the population to reach a critical mass without the threat of predation.
The announcement comes on the IUCN’s "Reverse the Red Day," a global initiative to highlight biodiversity success stories. Dr. Mark Outerbridge, the Bermudian government ecologist who spearheaded the local efforts, described the project as "extremely gratifying."
In an era of climate anxiety and mass extinction, the greater Bermuda snail offers a lesson in resilience. It is a reminder that while humanity has the power to destroy, it also possesses the ingenuity to restore. The snail is back, and it is here to stay.
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