Lonesome George

Lonesome George (c. 1910 – June 24, 2012) was a male Pinta Island tortoise (Chelonoidis nigra abingdonii) and the last known individual of the subspecies. In his last years, he was known as the rarest creature in the world. George serves as a potent symbol for conservation efforts in the Galápagos Islands and throughout the world.

George was first seen on the island of Pinta on 1 November 1971 by Hungarian malacologist József Vágvölgyi. The island's vegetation had been devastated by introduced feral goats, and the indigenous C. n. abingdonii population had been reduced to a single individual. It is thought that he was named after a character played by American actor George Gobel. Relocated for his safety to the Charles Darwin Research Station on Santa Cruz Island, it was hoped that more Pinta tortoises would be found, either on Pinta or in one of the world’s zoos, similar to the discovery of the Española male in San Diego. George was then penned with two females of a different subspecies. Although eggs were produced, none hatched. Unfortunately, no other Pinta tortoises were found. The Pinta tortoise was pronounced functionally extinct as George was in captivity.

Over the decades, all attempts at mating Lonesome George had been unsuccessful, due to the lack of females of his own subspecies. This prompted researchers at the Darwin Station to offer a $10,000 reward for a suitable mate.

Until January 2011, George was penned with two females of the subspecies Chelonoidis nigra becki (from the Wolf Volcano region of Isabela Island), in the hope his genotype would be retained in any resulting progeny. This subspecies was then thought to be genetically closest to George's; however, any potential offspring would have been intergrades, not purebreds of the Pinta subspecies.

...
Wikipedia