Question: What’s the world’s largest land mammal migration?
Answer: A vast river of 6 million antelope migrate across 46,000 square miles in South Sudan, as can be seen in the video at the link. The country released its first comprehensive aerial wildlife survey this week, relying for its count on a sample of collared animals, spotters in airplanes, and nearly 60,000 photos. That number far surpasses any other large migratory herd.
