An Epic Battle
Wildebeest make the largest migration of land mammals on the planet. Traveling 2,000 miles each year, 1.5 million animals are on the move. Lured to the Masai Mara by fresh grass. However, when they try to cross the river, crocodiles take them down. 2,000 die in a single crossing. The advantage of living in a swarm becomes apparent when 100,000 wildebeest simultaneously give birth.