Kanzi#Examples of behavior and abilities

Kanzi was born to Lorel and Bosandjo at Yerkes Field Station at Emory University in 1980. Shortly after birth, Kanzi was stolen and adopted by a more dominant female, Matata, the matriarch of the group.{{Citation needed|date=March 2025}}

In 1985, Kanzi was moved to the Language Research Center at Georgia State University. He was later relocated, along with his sister, Panbanisha, to the Great Ape Trust, in Des Moines, Iowa. The ill-fated facility, founded in 2004 by local businessman, Ted Townsend, closed after losing funding, experiencing allegations of neglect, and a flood.{{Citation needed|date=March 2025}}

In 2013, the Ape Cognition and Conservation Initiative (ACCI),{{Cite web|title=ACCI: Ape Cognition & Conservation Initiative|url=http://apeinitiative.org|access-date=2016-03-08|website=apeinitiative.org}} under the direction of Jared Taglialatela, a professor at Kennesaw State University in Georgia, and Bill Hopkins, a professor at Georgia State University, took over the facility.{{Cite web|last=Norvell|first=Kim|title=Baby apes may be coming to Iowa, home to the country's only bonobo research center|url=https://www.desmoinesregister.com/story/news/2018/04/24/iowa-ape-bonobo-research-expanding-mating/524553002/|access-date=2022-01-14|website=Des Moines Register|language=en-US}}

When the ACCI took over Kanzi's care in 2013, he was severely obese due to mismanagement of his diet and activity. His new caretakers changed Kanzi's diet to a more species-appropriate one and increased his opportunities for physical activity. Kanzi subsequently lost over seventy-five pounds.{{Cite web|title=Kanzi|url=https://www.apeinitiative.org/kanzi|access-date=2022-01-14|website=Ape Initiative|language=en-US}}

As an infant, Kanzi accompanied Matata to sessions where Matata was taught language through keyboard lexigrams, but showed little interest in the lessons. It was a great surprise to researchers then when one day, while Matata was away, Kanzi began competently using the lexigrams, becoming not only the first observed ape to have learned aspects of language naturalistically rather than through direct training, but also the first observed bonobo to appear to use some elements of language at all. Within a short time, Kanzi had mastered the ten words that researchers had been struggling to teach his adoptive mother, and since learned a further 348, which he could also combine for new meaning. When he heard a spoken word (through headphones, to filter out nonverbal clues), he pointed to the correct lexigram. He can initiate communication using the lexigrams. Sue Savage Rumbaugh, in 2006, claimed Kanzi understood about 3,000 spoken words.

According to a Discover article, Kanzi was an accomplished tool user.{{cite journal | journal = Discover |date=September 1994 | title = Ape at the Brink}}

Kanzi's adoptive mother, Matata, was believed to be in her mid- to late- 40s when she died in June 2014.{{cite news|last1=Finney|first1=Daniel|title=Bonobo Matata dies at Des Moines ape conservation|url=http://www.desmoinesregister.com/story/news/2014/06/22/bonobo-matata-des-moines-death/11245783/|access-date=27 June 2014|agency=The Desmoines Register|date=June 22, 2014}} In the matriarchal society of bonobos, a male's position is primarily determined by the position of the females he is related to. Matata was the group's chief leader so his status as the highest ranking male was established by being adopted as her "son". According to Smithsonian Magazine, Kanzi "has the mien of an aging patriarch – he's balding and paunchy with serious, deep-set eyes."Raffaele, Smithsonian, November 2006. This description is confirmed by a full-page color photograph of Kanzi in the March 2008 National Geographic, and a full-page black-and-white photograph in Time magazine.Time, August 16, 2010.

Kanzi died on March 18, 2025, at the age of 44. His death was announced the following day, on March 19, by the Ape Initiative where Kanzi lived in Des Moines.{{cite web |url=https://apeinitiative.org/remembering-kanzi |title=Remembering Kanzi |website=Ape Initiative |access-date=19 March 2025}}

Kanzi's behavior and abilities have been the topic of research published in scientific journals, as well as reports in popular media.

When he was eight years old, Kanzi was a subject of a research program in which his ability to respond to spoken requests was compared with that of a two-year-old human child called Alia. The study took nine months to complete. Kanzi and Alia were given 660 spoken instructions, asking them to deal with familiar objects in novel ways. Kanzi responded correctly to 74 percent of the instructions, Alia to 65 percent.{{cite journal

| last = Savage-Rumbaugh

| first = E. Sue

| author-link = Sue Savage-Rumbaugh

| title = Language Comprehension in Ape and Child

| journal = Monographs of the Society for Research in Child Development

| volume = 58

| issue = 3 to 4

| pages = i–252

| date = 1993

| jstor = 1166068

| doi = 10.2307/1166068| pmid = 8366872

| citeseerx = 10.1.1.473.9931

}}{{cite book

| last1 = Harris

| first1 = Margaret

| last2 = Butterworth

| first2 = George

| title = Developmental Psychology: a Student's Handbook

| publisher = Psychology Press

| date = 2012

| pages = 178 to 180

| isbn = 9781135844677

}}

Another study, designed and carried out by archaeologists Kathy Schick and Nicholas Toth, aimed to compare Kanzi's cognitive and mechanical abilities with those of early human ancestors who made and used Early Stone Age tools (probably Homo habilis), such as Oldowan stone flakes and cores (a core is the rock from which a flake has been removed). In this study, Schick and Toth showed Kanzi how to flake stone, producing a sharp edge that could be used to cut through a rope in order to gain access to a food reward. After modeling the flaking behavior on a variety of occasions, the researchers set up each experiment by placing a food reward inside a box with a transparent lid which was held closed by a length of rope. Kanzi would then be led into an enclosure where the box was located and provided with the stones needed for flaking (known as chert or flint). Over the course of this multi-year study, Kanzi not only learned how to flake, he also developed his own method by throwing the cobbles onto hard surfaces to make a flake, as opposed to the hand-held percussion method that was modeled for him. With the many sharp flakes he produced, Kanzi was able to cut through the rope to gain access to the food reward. However, the flakes he produced and used were more crude than those produced by Early Stone Age humans.Schick, K. D., Toth, N., Garufi, G., Savage-Rumbaugh, E. S., Rumbaugh, D., & Sevcik, R. (1999). Continuing Investigations into the Stone Tool-making and Tool-using Capabilities of a Bonobo (Pan paniscus). Journal of Archaeological Science, 26(7), 821–832.{{cite book

| last1 = Savage-Rumbaugh

| first1 = Sue

| author-link1 = Sue Savage-Rumbaugh

| last2 = Lewin

| first2 = Roger

| title = Kanzi: the Ape at the Brink of the Human Mind

| url = https://archive.org/details/kanzi00sues

| url-access = registration

| publisher = John Wiley

| date = 1994

| pages = [https://archive.org/details/kanzi00sues/page/201 201] to 222

| isbn = 978-0471159599}}{{Cite journal|last1=Toth|first1=Nicholas|last2=Schick|first2=Kathy D.|last3=Savage-Rumbaugh|first3=E.Sue|last4=Sevcik|first4=Rose A.|last5=Rumbaugh|first5=Duane M.|date=January 1993|title=Pan the Tool-Maker: Investigations into the Stone Tool-Making and Tool-Using Capabilities of a Bonobo (Pan paniscus)|journal=Journal of Archaeological Science|language=en|volume=20|issue=1|pages=81–91|doi=10.1006/jasc.1993.1006|bibcode=1993JArSc..20...81T }}

A similar study on the flaking abilities of chimpanzees failed to recreate the findings with Kanzi.{{cite journal |last1=Bandini |first1=Elisa |last2=Motes-Rodrigo |first2=Alba |last3=Archer |first3=William |last4=Minchin |first4=Tanya |last5=Axelsen |first5=Helene |last6=Hernandex-Aguilar |first6=Raquel Adriana |last7=McPherron |first7=Shannon |last8=Tennie |first8=Claudio |title=Naïve, unenculturated chimpanzees fail to make and use flaked stone tools |journal=Open Research Europe |date=2021 |volume=1 |issue=20 |page=20 |doi=10.12688/openreseurope.13186.2 |pmid=35253007 |pmc=7612464 |s2cid=237868827 |url=https://zenodo.org/record/5109257 |doi-access=free }} The authors suggest that the discrepancies in findings are due to the differences in rearing backgrounds of the subjects. Whilst Kanzi spent a significant portion of his life around humans and being trained by them (leading to a high level of enculturation), the chimpanzees in the more recent study were not trained or demonstrated how to make or use flakes (or in any other human behaviours). This may explain why Kanzi was able to develop flaking after observing humans, and the chimpanzees in the recent study were not.{{Citation needed|date=March 2025}}

In a study by Johns Hopkins University's Social and Cognitive Origins researchers published in February 2025 in Proceedings of the National Academy of Sciences, the research group "worked with three male bonobos, Nyota, 25; Kanzi, 43; and Teco, 13". If the researcher interacting with the bonobo [Kanzi or one of the other two] asked "Where's the grape?" but had clearly seen the treat being hidden, the bonobo "would usually sit still and wait for the treat" during the 10-second wait after the question; "but when [the researcher] hadn't seen where the treat was hidden, the ape would quickly point to the right cup—sometimes quite demonstratively". The study is "the first [such work] to replicate in a controlled setting similar findings from the wild". Johns Hopkins assistant professor Chris Krupenye noted "The results also suggest apes can simultaneously hold two conflicting world views in their mind. They know exactly where the food is, and at the same time, they know that their partner's view of the same situation is missing that information" and that "this so-called theory of mind supports many of the capacities" behind advanced human capabilities and social organization and "demonstrates the rich mental foundations that humans and other apes share".{{Cite web |last=Johns Hopkins University |first= |title=Bonobos realize when humans miss information and communicate accordingly |url=https://phys.org/news/2025-02-bonobos-humans-communicate.html |access-date=2025-03-24 |website=phys.org |language=en}}{{Cite journal |last=Townrow |first=Luke A. |last2=Krupenye |first2=Christopher |date=2025-02-11 |title=Bonobos point more for ignorant than knowledgeable social partners |url=https://www.pnas.org/doi/10.1073/pnas.2412450122 |journal=Proceedings of the National Academy of Sciences |volume=122 |issue=6 |pages=e2412450122 |doi=10.1073/pnas.2412450122 |pmc=11831142 |pmid=39899718}}

Kanzi was recognized for his ability to "evoke absent objects, invent new formulas to describe elements whose names he did not know...he had a certain notion of time and seemed to understand another's point of view."{{Cite book |last=Herzfeld |first=Chris |url=https://www.worldcat.org/oclc/982651819 |title=The Great Apes: A Short History |date=2017 |others=Kevin Frey, Jane Goodall |isbn=978-0-300-22137-4 |publisher=Yale University Press |location=New Haven |pages=148 |oclc=982651819}} The following are anecdotes, rather than experimental demonstrations.

• In an outing in the woods in Georgia, Kanzi touched the symbols for "marshmallows" and "fire". Susan Savage-Rumbaugh said in an interview that, "Given matches and marshmallows, Kanzi snapped twigs for a fire, lit them with the matches and toasted the marshmallows on a stick."{{cite magazine | url = http://www.smithsonianmag.com/science-nature/10022981.html | access-date = 2008-03-18 | date = November 2006 | magazine = Smithsonian | title = Speaking Bonobo | last = Raffaele | first = P | archive-date = 2013-12-16 | archive-url = https://web.archive.org/web/20131216231356/http://www.smithsonianmag.com/science-nature/10022981.html | url-status = dead }} The Telegraph published photographs of Kanzi putting together a fire for food.{{cite news| url=https://www.telegraph.co.uk/news/picturegalleries/howaboutthat/8985122/Amazing-photos-of-Kanzi-the-bonobo-lighting-a-fire-and-cooking-a-meal.html | work=The Daily Telegraph | title=Amazing photos of Kanzi the bonobo lighting a fire and cooking a meal | date=December 30, 2011}}
• Paul Raffaele, at Savage-Rumbaugh's request, performed a haka for the bonobos. This Māori war dance includes thigh-slapping, chest-thumping, and shouting. Almost all the bonobos present interpreted this as an aggressive display, and reacted with loud screams, tooth-baring, and pounding the walls and the floor. Kanzi, who remained calm, communicated with Savage-Rumbaugh using bonobo vocalizations; Savage-Rumbaugh interpreted these vocalizations, and said to Raffaele, "he'd like you to do it again just for him, in a room out back, so the others won't get upset." Later, a private performance in another room was carried out.
• Savage-Rumbaugh has observed Kanzi in communication to his sister. In this experiment, Kanzi was kept in a separate room of the Great Ape Project and shown some yogurt. Kanzi made some vocalizations that his sister could hear; his sister, Panbanisha, who could not see the yogurt, then pointed to the lexigram for yogurt, suggesting those vocalizations may have meaning.{{cite journal|last1=Savage-Rumbaugh|first1=Sue|last2=Fields|first2=William M.|last3=Spircu|first3=Tiberu|title=The emergence of knapping and vocal expression embedded in a Pan/Homo culture|journal=Biology and Philosophy|date=2004|volume=19|issue=4|pages=541–575|url=http://download.springer.com/static/pdf/527/art%253A10.1007%252FsBIPH-004-0528-0.pdf?auth66=1425777059_f3d012d65c3b2cd6e5c082b04af271b0&ext=.pdf|doi=10.1007/sbiph-004-0528-0|s2cid=84374259}}{{Dead link|date=March 2025 |bot=InternetArchiveBot |fix-attempted=yes }}
• In one demonstration on the television show Champions of the Wild,Season 4, Episode 3. Screened 10/30/2000 Kanzi was shown playing the arcade game Pac-Man and understanding how to beat it.
• On July 22, 2023, a video uploaded to YouTube by the user ChrisDaCow showed Kanzi playing a modified version of Minecraft. The video earned over 3 million views in 10 days and raised nearly $10,000 for The Ape Initiative as of August 2, 2023.{{Cite web |title=Are you smarter than an ape? Meet Kanzi: Des Moines' Minecraft-playing bonobo |url=https://www.desmoinesregister.com/story/news/local/2023/08/02/kanzi-des-moines-ape-initiative-bonobo-learns-minecraft-from-youtuber-chrisdacow/70485983007/ |access-date=2024-01-13 |website=The Des Moines Register |language=en-US}} On January 12, 2024, a sequel was published which featured him and another bonobo, his great-nephew Teco, defeating the game's final boss.{{Citation needed|date=March 2025}}

Kanzi learned to communicate using a keyboard with lexigrams. Kanzi also picked up signs from American Sign Language from watching videos of Koko the gorilla, who communicated using signs to her keeper Penny Patterson; Savage-Rumbaugh did not realize Kanzi could sign until he signed, "You, Gorilla, Question", to anthropologist Dawn Prince-Hughes, who had previously worked closely with gorillas.{{cite book|title= Songs of the Gorilla Nation|last= Prince-Hughes|first= Dawn|author-link= Dawn Prince-Hughes|year= 1987|publisher= Harmony|isbn= 978-1-4000-5058-1|page= [https://archive.org/details/songsofgorillana00prinrich/page/135 135]|url= https://archive.org/details/songsofgorillana00prinrich/page/135|url-access= registration}} Based on trials performed at Yerkes Primate Research Center, Kanzi was able to identify symbols correctly 89–95% of the time.{{Cite journal|title = Comprehension Skills of Language-Competent and Nonlanguage-Competent Apes.|last = Williams|first = S.L.|date = 1997|journal = Language and Communication Journal.|volume = 17|issue = 4|pages = 301–317|doi = 10.1016/S0271-5309(97)00012-8}}

Kanzi could not vocalize in a manner that is comprehensible to most humans, as bonobos have different vocal tracts than humans, which makes them incapable of reproducing most of the vocal sounds humans can make. Nonetheless, it was noticed that every time Kanzi communicated with humans with specially-designed graphic symbols, he also produced some vocalization.{{cn|date=March 2025}} File:American_Sign_Language_ASL.svg Later, it was discovered that Kanzi was producing the articulatory equivalent of the symbols he was indicating, although in a very high pitch and with distortions.Greenspan, S. I., and S. G. Shanjer. 2004. The first idea: How symbols, language and intelligence evolved from our primate ancestors to modern humans. Da Capo Press.

According to the research of Savage-Rumbaugh, Kanzi "can understand individual spoken words and how they are used in novel sentences". For example, the researcher asked Kanzi to go get the carrot in the microwave, Kanzi went directly to the microwave and completely ignored the carrot that was closer to him, but not in the microwave."Chimp matches 2-year-old Cognitive capabilities more like humans' than experts believed." Globe & Mail [Toronto, Canada], April 6, 1991, A11. Opposing Viewpoints in Context (accessed December 1, 2018). http://link.galegroup.com.librarynt.occc.edu/apps/doc/A164263203/OVIC?u=okccc_main&sid=OVIC&xid=ca8f20a0{{Dead link|date=March 2025 |bot=InternetArchiveBot |fix-attempted=yes }} . In another example, a researcher gave the task, "feed your ball some tomato". Alia, a human 2-year-old, did not know what to do, but Kanzi immediately used a spongy toy Halloween pumpkin as a ball and began to feed the toy.Wise, Steven M. "Why Animals Deserve Legal Status." Higher Education, February 2, 2001, B13. Quoted in "Animals Deserve Legal Rights." Animal Rights, edited by Shasta Gaughen. Contemporary Issues Companion. San Diego, CA: Greenhaven Press, 2005. Opposing Viewpoints in Context (accessed December 1, 2018). http://link.galegroup.com.librarynt.occc.edu/apps/doc/EJ3010344210/OVIC?u=okccc_main&sid=OVIC&xid=e0a8a0ce{{Dead link|date=March 2025 |bot=InternetArchiveBot |fix-attempted=yes }} .

Although Kanzi is considered to be the best case for apes acquiring language-like capabilities, his utterances were not equivalent to that of a 3-year-old child. Kanzi’s utterances still rely heavily on human interpretation, a common criticism of great ape language experiments. For example, when Kanzi used "strawberry" it would be interpreted as a request to go to where the strawberries grow, a request to eat some, used as a name, and so on dependent on the handler’s interpretation and context.{{Cite book |last=Harley |first=Trevor A. |url=https://www.worldcat.org/oclc/848267838 |title=The psychology of language : from data to theory |year=2014 |isbn=978-1-84872-089-3 |edition=4th |location=Hove, East Sussex |pages=65 |oclc=848267838}}

Kanzi also showed no ability in the use of function words, nor could he make use of morphology, such as indicating the plural form of a noun, or syntax. As with other great ape language experiments, Kanzi was not considered by some linguists to display a capacity for language.{{cite web |title=Lingua Franca: Koko Is Dead, but the Myth of Her Linguistic Skills Li… |url=https://www.chronicle.com/blogs/linguafranca/koko-is-dead-but-the-myth-of-her-linguistic-skills-lives-on#selection-2503.139-2511.208 |archive-url=https://archive.today/20231211182257/https://www.chronicle.com/blogs/linguafranca/koko-is-dead-but-the-myth-of-her-linguistic-skills-lives-on#selection-2503.139-2511.208 |url-status=dead |archive-date=2023-12-11 |website=archive.ph |date=11 December 2023}}

{{div col}}

• Ape language
• Evolution of language
• Human Ape, a National Geographic documentary film
• List of individual apes
• Primate archaeology
• Yerkish

{{div col end}}

Other animals used in language studies:

{{div col}}

• Akeakamai
• Alex (parrot)
• Batyr
• Chantek
• Koko
• Kosik
• Nim Chimpsky
• Nyota
• Panbanisha
• Washoe

{{div col end}}

{{reflist}}

• Joseph, John E., Nigel Love & Talbot J. Taylor (2001). Landmarks in Linguistic Thought II: The Western Tradition in the 20th Century (London & New York: Routledge), chapter 15: "Kanzi on Human Language".
• de Waal, Frans (2005). Our Inner Ape, {{ISBN|1-57322-312-3}}.
• Raffaele, Paul (2006), "The Smart and Swinging Bonobo", Smithsonian, Volume 37, Number 8 (November 2006—a general article about bonobos).

{{commons category|Kanzi (pan paniscus)}}

• [https://web.archive.org/web/20120512222457/http://sixtyminutes.ninemsn.com.au/article.aspx?id=8360218 60 Minutes Australia Talk to the Animals October 2011 featuring Kanzi]
• {{YouTube|wRM7vTrIIis|Kanzi recognizing the symbols of the lexigram}}
• [http://www.ted.com/index.php/talks/susan_savage_rumbaugh_on_apes_that_write.html The Gentle Genius of Bonobos], TED talk in part about Kanzi
• [https://web.archive.org/web/20090809190717/http://kanzi.bvu.edu/ Video documentary site] by Sue Savage-Rumbaugh containing a documentary featuring [https://web.archive.org/web/20130725042523/http://kanzi.bvu.edu/Kanzivideos2.html Kanzi]
• [http://www.smithsonianmag.com/science-nature/10022981.html Speaking Bonobo article at the Smithsonianmag webpage] {{Webarchive|url=https://web.archive.org/web/20131216231356/http://www.smithsonianmag.com/science-nature/10022981.html |date=2013-12-16 }}
• [apeinitiative.org/remembering-kanzi]

{{Notable apes}}

{{Great ape language|state=expanded}}

Category:1980 animal births

Category:2025 animal deaths

Category:Individual apes involved in language studies

Category:Ape Cognition and Conservation Initiative

Category:Animal intelligence

Category:Individual bonobos

Category:Emory University

Category:Georgia State University

Category:Individual primates in the United States