 Koko (gorilla)

Hanabiko "Koko" (July 4, 1971 – June 19, 2018) was a female western lowland gorilla known for having learned many hand signs from a modified version of American Sign Language (ASL).Koko was born at the San Francisco Zoo and lived most of her life in Woodside, California, at The Gorilla Foundation's preserve in the Santa Cruz Mountains.