en Altadefinizione. Disneynature Migration sweeps across the surface of the planet to witness the mysteries of migration. To answer the questions of why and how hundreds of thousands of animals, birds and insects leave their homes to travel up to thousands of miles before returning, we’ll follow several species as they make their miraculous journeys. Along the way, we’ll see how both man and nature may conspire against these creatures, making their remarkable treks even more impossible.