Sudd

The Sudd wetland, with an estimated area of approximately 57,000 km2 represents one of the largest freshwater ecosystems in the world. The extent of the Sudd wetlands is highly variable; it depends largely on the seasons and years respectively. In the wet season the size of the wetland increases up to 90,000 km² and gradually decreases to about 42,000 km² depending on high seasonal flooding. It is internationally recognised for its unique ecological attributes that include various endangered mammalian species, antelope migrations, millions of Palaearctic migratory birds and large fish populations. Notable wildlife species include the African elephants, Nile lechwe endemic to South Sudan, tiang migration, white-eared kob migration, buffalo, and bird species