National Geographic Video: Africa's Animal Oasis [VHS]
Upon the African continent lies Tanzania's Ngorongoro Crater, the  middle of an extinct volcano with conditions so optimal for animal life that there are 20,000 beasts crowded into it. But the very conditions that allow the animal population in general to thrive also make it difficult for the  individual to survive. This drama is played out time and again in this  55-minute video, as viewers watch a nervy lioness enter a hippo enclave to  make a meal of one of their dead or as hyenas attack and kill a cub from a  rival family. Newborn wildebeest are up on their feet within minutes of  birth, running within the half-hour, and yet one in four will perish.  Photographers capture images of the Masai who (legally) bring their herds  into the protected area for water with apparently little effect. Juxtaposed are images of picnicking tourists on the canyon rim laughing as aggressive  birds steal their sandwiches. The documentarians don't hesitate to indict the visitors and the 100 vehicles a day they bring to the canyon rim for  threatening the isolation of this unusual place and its wild way of  life.--Kimberly Heinrichs