are home to an astounding number of white-eared kob—hundreds of thousands of animals. When joined by tiang antelopes and Mongalla gazelles they form enormous migrating herds of more than 1.2 ...

"This is one of the largest intact savannas in Africa," he said. He tipped down in the direction of a herd of white-eared kob, streaming north by the thousands. Some species have almost ...