Fifteen years ago the yellow-eared parrot was presumed extinct. Its rediscovery in Colombia forced the Catholic Church to abandon an age-old tradition, and brought about one of the most amazing comebacks in the Americas.
For centuries the study of bird migration has been riddled with mystery and unanswered questions: Where do birds go in winter? How far do they fly? Can they navigate a hurricane? Scientists are tapping new technologies to find the answers, and transforming everything we know—or think we know—about birds.