National Geographic Wild Africa's Blood River

Blood River:
In one of the most brutal migrations on the planet, a zebra mother and her foal run the gauntlet of the Mara River's crocodiles.
 
In the most brutal migration on the planet, ride shotgun with ZuluEcho545 and FoxtrotOne, a zebra mother and her son. They run the gauntlet through crocodile infested rivers and lion offensives, culminating in the world's ultimate ambush: the Mara River -- where the biggest crocodiles in Africa are on the attack.