A hunk of a tortoise is solely responsible for bringing his species back from extinction, after fathering over 800 tortoise babies.

We know, it sounds completely insane, but the 100-year-old's sexcapades in the past 50 years means he has fathered over 40% of his population.

The Debrief reports that the species, which is known as the Chelonoidis Hoodensis, is a native to the southern Galapagos Island of Espanola.

Diego is now a resident of The San Diego Zoo and it is believed he arrived in the US in the 1950s. Since 1977 he's lived on Santa Cruz Island, which is right beside his hometown of Espanola.

His only job was to repopulate his species as part of a breeding program in the country.

Today, around 2,000 giant tortoises have been released back the Galapagos Island, and that's a major change from 50 years ago, when only two males and 12 females populated it.

According to Washington Tapia, a tortoise preservation specialist, "it's a population that's in pretty good shape – and growing which is important."

Fair play Deigo, you did a good job.