Right now, you have a digital map of the world at your fingertips. Wherever your day takes you, the chances are you will be chaperoned by a portable device that ensures that map never strays beyond arm’s reach. If you were really in a pinch, you could probably dig out a paper map, but what if we took those maps away? How far could you travel from home and be confident that you’d find your way back?

For four hundred years, the Northern Bald Ibis disappeared from European skies. Today, thanks to the work of conservationists, nearly 300 reintroduced birds make their yearly pilgrimage between their breeding grounds in Austria and their wintering grounds in Spain. This was the first attempt to reintroduce a continentally extinct migratory species and the journey has been one of creativity, nerve and incredible determination.