Serengeti Wildebeests Migration is a display of natural wonders with over two million wildebeests, zebras, and antelope traveling over 450 miles across the plain to ensure their survival, unaware that there's danger presented by the stalking lions and cheetahs among other predators of the wildlife. Witness huge crocodiles of the Mara River as they wait for the herbivorous to cross the swollen Mara river and enter into Masai Mara Game Reserve from Serengeti National Park. River crossing is at its height in August and lasts until September. The mega herds move non-stop as they follow the rain, and head to greener pastures. The height of action in Kogatende is at its peak during August.