Western gorilla

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BROOKFIELD, IL - SEPTEMBER 13: Binti Jua, a Western Gorilla, sits in her enclosure at the Brookfield Zoo September 13, 2007 in Brookfield, Illinois. Western Gorillas have been listed as 'critically endangered,' one step away from global extinction, by the World Conservation Union. Binti drew international attention in 1996 when she retrieved a three-year-old child that fell around 20 feet into the enclosure. (Photo by Scott Olson/Getty Images)