June 12, 2007—It may be the world's largest land migration: the white-eared kob's annual journey across a thousand miles (1,600 kilometers) of Southern Sudan's floodplains.

In a spectacle that rivals the wildebeest exodus across the Serengeti, hundreds of thousands of the antelope—perhaps more than a million—trek across the African savanna each dry season in search of greener pastures.

Scientists have long feared that 25 years of bloody civil war had wiped out the kob—along with elephants, lions, ostriches, and the other large animals that contribute to Sudan's diverse and unique mix of wildlife. But a new aerial survey of the region shows that massive numbers of animals survived—and in some cases even flourished. (Read the full story on the massive herd finds.)

(Read the full story and see pictures of the animals.)

See stunning footage and pictures of the first aerial survey of Southern Sudan in 25 years, and learn why some scientists are now concerned that peace poses even more danger to the wildlife than war.