January 20, 2019

A Snail Called George, Believed to Be the Last of His Species, Dies

It is said that artists are never fully appreciated until they die. The same goes for snails, apparently.

For roughly a decade, the land snail species Achatinella apexfulva, which used to be plentiful on the Hawaiian island of Oahu, was believed to be down to a single survivor. His name was George, and he lived his last days alone in a terrarium in Kailua, Hawaii, alongside an ample supply of fungi (a food his ancestors liked to scrape off leaves in the wild).

But on Jan. 1, George died, according to Hawaii’s Department of Land and Natural Resources. He lived to about age 14 — a good, long life for a snail of his kind, experts say. His death was symbolic of a steep decline in the population of land snails, once a fantastically diverse group of mollusks in Hawaii, as well as the rapid extinction of species around the world.

Scientists estimate that dozens of species go extinct each day, but few receive this kind of news media attention on their way out. Naming George probably boosted his standing, said Michael G. Hadfield, who founded a program meant to protect snail populations in Hawaii.

At one point, there were more than 750 species of land snails identified on the Hawaiian Islands. George’s species was the first to be described in Western scientific literature: When the British explorer Captain George Dixon visited Oahu in the 1780s, he was given a lei made with some of the snails’ shells, according to the Department of Land and Natural Resources.

But estimates suggest that more than half of those species are already extinct, Dr. Sischo said.

The land snails have been affected most by invasive predators like rats and the rosy wolfsnail, which eats other snails. They have also faced habitat destruction and the effects of climate change; drier conditions have reduced the inhabitable land on the islands, Dr. Sischo said.

Documents from the 19th century described land snails as hanging off plants like clusters of grapes, said Dr. Hadfield, who is now a professor emeritus of biology at the University of Hawaii. In the 1980s, Dr. Hadfield more often saw them lying dead on the ground.

After the plight of the land snails gained some attention, the entire Achatinella genus was listed as endangered in 1981. Dr. Hadfield said the genus may have gotten preferential treatment because its snails are often the most striking to behold.

“There are bright gold ones, there are pure white ones, there are unearthly greens,” he said. “Most of us feel that these snails, outside of where they’re being protected, probably won’t last much longer.”

George himself was a thumbnail-size whorl of dark brown and tan. He looked like a swirled scoop of mocha fudge.

Although his caretakers use “he” to describe George, the snail is actually a hermaphrodite. And unfortunately for his species, Dr. Sischo says, he could not produce offspring without a mate.

Right now, George’s body is submerged in a container of alcohol, and his shell is destined for a local museum. But there is a strange sliver of hope for his future.

In 2017, researchers removed a two-millimeter piece of his foot to preserve in a deep-freeze container, according to the Department of Land and Natural Resources. The hope was that someday soon, scientists will develop the technology to clone a snail.

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