The number of wildebeests that die during the migration

During the migration, wildebeests often cross dangerous rivers in huge numbers, so large numbers of wildebeests attempt to cross the rivers at the same time, but the water is too deep. In the chaos and panic, many of them are pushed under the water, become exhausted, and drown. Once one starts falling or struggling in deep water, others behind them continue pushing forward, leading to tragic mass drownings.