WITHOUT BORDERS

E very year nature offers one of the most incredible sights that can be

seen: migration. A highly fascinating journey without borders, full of

mysteries to be revealed. Billions of animals on the move travel across

our planet. Small or large, on their own or in groups, they cover tens of

thousands of kilometres in flight, walking or swimming, facing

difficulties and dangers, on treacherous routes that often cost them

their lives. The giants of the world, whales, migrate and some of the

most graceful creatures, butterflies, migrate; as do birds, terrestrial and

flying mammals, fish, amphibians reptiles, all sorts of insects and other

invertebrates, such as crabs, above all suspicion. On this journey, many

undergo incredible transformations, others are as punctual as Swiss

watches, to the point that a calendar can be established, other cover

distances that are equivalent to three times the journey to the Moon

and back. How do they reach their destination? How do they find their

bearings and how do they manage to return every year to exactly the

place where they were born? And above all, why do they migrate?