BirdsThe brown tree snake hit the jackpot when it found its way onto the island of Guam – flightless, ground-nesting birds with no defenses against a snake. Several bird species, including the Guam rail, were wiped out. Managed breeding and reintroduction on Guam and neighboring islands are the rail’s best hope for survival. Risk Status Species at Risk (IUCN—Extinct in the wild)