 These animals are always moving. That many animals can't stay in one place. So they'll be moving across an area of about 200,000 square kilometers, so 20 million hectares. The white-eared cob, which is the largest aggregation, there's 5 million of them. They're moving really from the Burma National Park to Badangilo, crossing the great floodplains of the White Nile. And the tiang are really moving up and down from the sud, down back to the wetlands themselves along the White Nile.