In June of 2012, the by then iconic tortoise, Lonesome George, passed away at the age of 102. He had grown famous as the last remaining male of his species of Galapagos Tortoise, a taxa of diverse animals that were critical to Charles Darwin’s development of evolutionary theory.

Like Darwin’s finches, the tortoises became synonymous with biological variance, as well as for their scarcity. As early as the 18th century, pirates and whalers had begun hunting the tortoises for food. They were an ideal livestock to keep in a ship’s hold, being able to survive months without food or water. By the 19th century two species had become extinct, and other species, like that of Lonesome George, were nearing the verge.

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George became famous because of his inability to reproduce. Years and years of encouragement — George lived a plush, well-fed life in a breeding center with two female tortoises — were of no avail. The tortoise rarely showed sexual interest, and the only two eggs to come out of the enclosure were infertile.

It was a tragic situation, as his death meant the extinction of a species.

Thankfully, George’s story isn’t the last gasp for all the islands tortoises. There are hopes for other species on the Galapagos islands.

One such beacon of hope is a tortoise known as Diego. Quietly sequestered away in a breeding program on the Island of Espanola, Diego has fostered over 1,700 baby tortoises over the past thirty years. It’s an accomplishment which has earned him a nickname: Super Diego.

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“He's a very sexually active male reproducer,”said Washington Tapia, a tortoise preservation specialist at Galapagos National Park. “He's contributed enormously to repopulating the island.”

Like many of our own fictional superheroes, Super Diego, saved his species from the threat of extinction. In the 1970’s, he was one of two male tortoises in a population that totaled a mere 14, including the other twelve females.

His work has been greatly admired:

What Legend of a tortoise. Diego shall go down in history as the GOAT of Tortoises

— Husni  (@AbuScarface) September 14, 2016

My first son's middle name will be Diego in honor of the tortoise that saved his species.

— B. (@BG2MPH) September 14, 2016

Behind Lonesome George, Super Diego is now the most famous tortoise on the Galapagos Islands. Curiously, of course, it is for the exact opposite reason. And, at the ripe old age of 134, Diego shows no signs of stopping.