BY the mid-1970s, only four Mauritius Kestrels remained in the wild, and many scientists had given them up for dead. Not Carl Jones, however. The Welsh biologist arrived on Mauritius, a tropical island in the Indian Ocean, determined to save the species at all costs. Employing a suite of innovative techniques, from artificial insemination to supplemental feeding, he was able to boost the population back into the hundreds, where it persists to this day.
Several other bird species have likewise rebounded after being reduced to just a few individuals, including the California Condor, Whooping Crane, Laysan Duck, Crested Ibis, Black Robin, and Seychelles Magpie-Robin. Jones himself saved four additional species endemic to the country of Mauritius: the Pink Pigeon, Echo Parakeet, Rodrigues Fody, and Rodrigues Warbler, each of which had…