WILDLIFE -- Follow the Footsteps: Blue Wildebeest

In May, when the dry season comes to East Africa's Serengeti plain, vast herds of a particular grazing animal set out to make a thousand-kilometer march north in search of fresh grass. These are blue wildebeests. They travel in herds of over a million head that include many newborns. As they migrate, they face numerous challenges and hardships. Cheetahs, lions and other predators stalk them. Calves stray. Rivers must be crossed. The safest way to ford them is to simply follow the herd. If whoever's in front makes it across safely, it means that the herd's on the safest path. With a particular focus on a newborn calf, this program documents this great spectacle of nature -- the blue wildebeests' great migration across the Serengeti.