"He's a very sexually active male reproducer. He's contributed enormously to repopulating the island," said Washington Tapia, a tortoise preservation specialist at Galapagos National Park.
Diego is a Chelonoidis hoodensis, a species found in the wild only on Espanola. . . .
Around 50 years ago, there were only two males and 12 females of Diego's species alive on Espanola, and they were too spread out to reproduce.
He has done more than any other tortoise to turn that around -- with the help of his mates, of course.
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