The migration is influenced by the availability of food and water, as well as the changing seasons. It typically starts in the southern Serengeti around December, when the wildebeest give birth to their young. As the dry season approaches, around June or July, the herds begin their treacherous journey towards the north, crossing rivers and facing predators along the way. The most famous river crossing is the Mara River, where crocodiles lie in wait for their chance to prey on the migrating animals. The migration reaches its peak in the northern Serengeti and Maasai Mara around August or September, as the herds graze on the lush grasses. It's an incredible sight to see thousands of wildebeest and zebras stretching as far as the eye can see. The migration continues until November, when the herds start returning to the southern Serengeti, completing the cycle. Witnessing the Great Wildebeest Migration is a once-in-a-lifetime experience. It's a true testament to the resilience and determination of these animals.