Across the world, migrating animal populations are dwindling. Here's why
In a landmark UN study, researchers found nearly half of the world's threatened migratory species have declining populations. More than a fifth of the assessed animals face extinction.
Every year, as the seasons change, billions of animals embark on journeys to find food, to get to better habitats or to breed. They migrate in groups and as individuals, flying, swimming, crawling and walking across international borders and through habitats to survive, transporting seeds and nutrients.
A major new report by the United Nations finds that humans are
