 After an intensive search in 2013, a team of scientist identified 11 snakes that matched the original description of the species.They conducted a series of DNA tests to confirm that the Islas Revillagigedo nightsnake, formerly viewed as the subspecies "Hypsiglena torquata unaocularis", is genetically distinct from related mainland snakes and should be recognized as a full species.While never formally declared extinct, this species remained absent from scientific literature due to two main factors