Hanabiko "Koko" (July 4, 1971 – June 19, 2018) was a female western lowland gorilla. Koko was born in San Francisco Zoo, and lived most of her life at The Gorilla Foundation's preserve in the Santa Cruz Mountains. The name "Hanabiko" (花火子), lit. 'fireworks child', is of Japanese origin and is a reference to her date of birth, the Fourth of July. Koko gained public attention upon a report of her having adopted a kitten as a pet and naming him "All Ball", which the public perceived as her ability to rhyme. Her instructor and caregiver, Francine Patterson, reported that Koko had an active vocabulary of more than 1,000 signs of what Patterson calls "Gorilla Sign Language" (GSL). This puts Koko's vocabulary at the same level as a three-year-old human. In contrast to other experiments attempting to teach sign language to non-human primates, Patterson simultaneously exposed Koko to spoken English from an early age. It was reported that Koko understood approximately 2,000 words of spoken English, in addition to the signs. Koko's life and learning process has been described by Patterson and various collaborators in books, peer-reviewed scientific articles, and on a website. More information...

The website is placed before and after in the BestRef global ranking of the most important sources of Wikipedia.

PR-model F-model AR-model
54,345th place
106,556th place
61,573rd place
44,620th place
96,451st place
47,194th place
26,934th place
124,921st place
46,953rd place
44,957th place
116,825th place
76,177th place
31,841st place
182,106th place
45,145th place
60,665th place
248,926th place
81,091st place
105,667th place
170,047th place
104,078th place
37,749th place
72,391st place
69,373rd place
26,637th place
16,194th place
74,330th place
34,702nd place
88,905th place
16,102nd place
64,217th place
37,745th place
54,678th place
66,684th place
55,400th place
61,040th place
26,628th place
56,300th place
18,664th place
26,572nd place
108,499th place
27,977th place
44,996th place
60,575th place
22,095th place
44,403rd place
80,677th place
50,950th place
153,631st place
219,334th place
262,964th place
57,975th place
101,546th place
81,659th place
32,847th place
77,927th place
46,017th place
32,302nd place
17,355th place
30,562nd place
49,548th place
71,404th place
50,247th place
40,337th place
53,796th place
41,692nd place
16,579th place
11,624th place
8,735th place
56,550th place
9,424th place
21,618th place
50,000th place
47,300th place
48,137th place
35,861st place
35,429th place
31,424th place