 Specimens of these extinct taxa exist in several museums and also are being subjected to DNA analysis.10 species of the original 15 survive in the wild; an 11th species ("Chelonoidis abingdonii") had only a single known living individual, kept in captivity and nicknamed Lonesome George until his death in June 2012.Conservation efforts, beginning in the 20th century, have resulted in thousands of captive-bred juveniles being released onto their ancestral home islands, and the total number of the species is estimated to have exceeded 19,000 at the start of the 21st century.