Which antelope species in South Sudan has a migration of over a million individuals?

The white-eared kob is the antelope species associated with South Sudan’s migration of more than a million individuals.

These antelopes move seasonally across the wetlands and grasslands of South Sudan, especially between Badingilo and Boma national parks, with some animals crossing into Ethiopia’s Gambella National Park. Their movements follow changing rainfall, flooding, water availability, and fresh grazing.

Earlier surveys counted more than 1.2 million white-eared kob, tiang, and Mongalla gazelles together. More recent aerial surveys suggest roughly 5 million white-eared kob may participate in the wider Great Nile Migration, making it the dominant species in one of Earth’s largest land-mammal migrations.

The species was once feared to have been devastated by decades of conflict and hunting. Aerial surveys after the South Sudanese civil war instead revealed surprisingly large surviving herds. The gazelle, wildebeest, and springbok choices are unrelated distractors: wildebeest migrations occur mainly in East Africa, while springbok are associated with southern Africa.