There are two seasons of the year when the drying of the floodplains occurs: after the peak of the flood before the summer rains and after the rains when the Delta is waiting for the floodwaters to arrive.
As the waters on the floodplains recede pools are cut off from the main flow and trap countless creatures in the muddying morass. The feeding orgy that occurs in the 'fish traps' is a wonder of nature in its own right.
Although the levels of the drying differ each year, there will always be the drama somewhere on the South-western floodplains.
As the floodplains are shrinking schools of tiny fish can be seen heading on mass to areas of permanent water to escape the coming drying. These fish head north to await the floodwaters - and then move with the water back onto the floodplains.
The drying up occurs very quickly, especially before the first rains as it is the hottest time of the year, and the predatory birds begin to gather. Pools on the floodplains are formed by Elephant and Buffalo wallows from seasons before and these become death traps for the fish and crustaceans that are caught in them.
Birds that take advantage of the feast include Herons, Egrets, Storks and Eagles, with Jackals and Hyenas joining in. In fact even Lions have been observed feeding on the trapped fish.