Most animals are sedentary: they always live in the same place or make short trips. But the slow evolution of continents, climate change, and environmental transformations lead many species to travel to survive... This book allows us to accompany animals that – by land, sea, and air – make the longest and riskiest journeys. Some travel thousands of kilometers, crossing continents and oceans, between where they spend the winter and their summer residence, or from breeding areas to feeding grounds. Others make short journeys but expose themselves to all kinds of dangers and vicissitudes. These displacements are astonishing adventures that test each creature's endurance, their obstinate determination, and their ability to orient themselves.