@natgeoanimals: Have you ever seen seemingly endless herds of animals traversing the grasslands in an unbroken stream? Each year, millions of antelope sweep across southeastern South Sudan toward the wetlands during the dry season, then return and disperse once the rains return. The migration far exceeds the more famous "Great Migration" of wildebeest in Eastern Africa, but it went unnoticed for decades due to conflict in the region. Filmed by drone for the first time by Nat Geo photographer Marcus Westberg, we can finally appreciate its massive scale. Find out more about the largest land mammal migration on Earth and the efforts to protect it at the 🔗 in bio.