Season 28, Episode 9 Moment of Impact: Hunters and Herds

First Aired: April 4, 2010

The predators and prey of the world's grasslands are examined. Including: the wildebeest of Africa's Serengeti, which risk becoming lion meals unless they maintain a 50-yard safety zone from the big cats; the ground squirrels of California's grasslands, which flick their tails at rattlesnakes in order to fool the reptiles' heat-sensing pits so they perceive them as larger than they really are. Also: the giraffe; the elephant.

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  • Premiered: October 10, 1982
  • Rating: TV-G
  • Premise: PBS's signature (and multi-award-winning) natural-history series uses gifted wildlife documentarians and stunning photography to reveal what its first host, Donald Johanson, called `the magic and mystery of the fascinating natural world.' The series has ga… (more)

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