As water sources dry up after the seasonal rains, and then again when the seasonal rains return, enormous herds of animals migrate in Boma National Park, South Sudan. It is estimated that the migration is far greater than the famous migration of the Serengeti, where nearly 2,000,000 animals search for grazing. See the map on the home page of this web site to locate Boma National Park and an animated movement of the migration.
See following link to an excellent video about collaring of elephants, Kob and Tiang in Boma National Park, by the Wildlife Conservation Society and the South Sudan Wildlife Service-
Every year the movement takes place at different times depending on the rains.
Elephant herd from the air in Boma National Park. Some of the elephants have been radio collared so that they can be tracked. See the November 2010 issue of National Georgraphic about elephants being radio collared in Boma.
Boma National Park is the largest park or reserve in all of Africa. Many people say Kruger or Ruaha or Virunga are the largest, but no it is Boma at 22,800 square kilometers. Boma National Park is 2,280,000 hectareas (5,631,600 acres) in size. This vast park has virtually no roads or park ranger outposts. Mostly flat it is crossed by many small streams and swamps.