Close on their tails, Lion, Hyena, Leopard and Cheetah are all looking for an opportunity to take their prey. When these huge herds have to cross rivers scores of crocodile lie in wait to take their share of the bounty. Not all make it to the other side and most often the young and weak become the predators prey. The river crossings are spectacular, but simply witnessing thousands of animals on the plains, with the attendant predators, is a sight in itself – and a year round event. The migration is relatively predictable, but dependent on weather conditions.