For nearly forty years, the Guam Rail bird (locally known as the Ko'Ko') has been extinct in the wild — decimated by the invasive brown tree snake. But the Ko'Ko' has been successfully re-introduced. It is the second bird in history to recover from extinction in the wild. Wildlife biologist Suzanne Medina tells us the story of how the Guam Department of Agriculture brought the Ko'Ko' back, with a little matchmaking and a lot of patience. (Encore episode)Follow host Maddie Sofia @maddie_sofia and reporter Emily Kwong @emilykwong1234 on Twitter. Email the show at shortwave@npr.org.