Galapagos Tortoise - Rediscovered

Yale University

A giant Galapagos tortoise, made famous by Darwin and thought to be extinct for over 150 years, still exists on the volcanic slopes of the northern shore of the tropical island "Isabela" in the Galapagos archipelago, according to new research.

Genetic analysis found that hybrids resulted from matings between the "extinct" tortoise and another species.
This is the first time that a species has been rediscovered using genetic footprint tracking. from here