Animal migration has fascinated humans for millennia. And for good reason: Some of the most astonishing feats of endurance are performed by long-distance migrants, such as the nine-day non-stop flight ...

Migrating animals have for a long time been tracked by recapturing tagged individuals. More recently, radio-telemetry, which requires an observer to physically follow the tagged animal, has been used.

South Sudan is trying to protect the largest land mammal migration in history by partnering with the nonprofit organization African Parks to safeguard the migratory species that rely on the ecosystem ...