Koko, the famous gorilla who spoke sign language, is deadThe primate, subject of many documentaries, was aged 46 years old. His vocabulary exceeded the 1000 words.
Koko, a captive-bred gorilla who became known worldwide for his mastery of sign language, died on Wednesday 20 June at 46 in California, the Gorilla Foundation announced, following the animal.
The primate, who was born July 4, 1971 at the San Francisco Zoo, died "in her sleep," the foundation said in a statement.
"Koko's capacity for language and her empathy has opened the minds and hearts of millions of people," the foundation noted, calling her "an icon of interspecies communication." "She was dearly loved and will be dearly missed."
From 1972, a researcher and psychologist for animals, Francine Patterson, began to teach Koko sign language, before continuing her apprenticeship at Stanford University, where was established the foundation, dedicated to the study of gorillas in captivity .
Koko, who will gradually master more 1000 words, was then the subject of many reports that made his reputation. Starting with the cover of National Geographic, in October 1978, which showed her taking her picture by looking in a mirror.
Koko also rose to fame with her affection for her kitten, whom she named "All Ball". A children's book, "Koko's kitten", has even been published. When the cat died, hit by a car, Koko had displayed his sorrow for months.