Speaking Bonobo

Bonobos have an impressive vocabulary, especially when it comes to snacks

  • By Paul Raffaele
  • Smithsonian magazine, November 2006, Subscribe
 
Sue Savage-Rumbaugh (with Kanzi in 2003) says her bonobos can communicate with her and each other using more than 348 symbols. Sue Savage-Rumbaugh (with Kanzi in 2003) says her bonobos can communicate with her and each other using more than 348 symbols.

Great Ape Trust of Iowa

 

Article Tools

 
  • Comments (21)
  • Font
    		•
  • Email
    		•
  • RSS
    		•
  • Print
    		•
    More from Smithsonian.com

    To better understand bonobo intelligence, I traveled to Des Moines, Iowa, to meet Kanzi, a 26-year-old male bonobo reputedly able to converse with humans. When Kanzi was an infant, American psychologist Sue Savage-Rumbaugh tried to teach his mother, Matata, to communicate using a keyboard labeled with geometric symbols. Matata never really got the hang of it, but Kanzi—who usually played in the background, seemingly oblivious, during his mother’s teaching sessions—picked up the language.

    Savage-Rumbaugh and her colleagues kept adding symbols to Kanzi’s keyboard and laminated sheets of paper. First Kanzi used 6 symbols, then 18, finally 348. The symbols refer to familiar objects (yogurt, key, tummy, bowl), favored activities (chase, tickle), and even some concepts considered fairly abstract (now, bad).

    Kanzi learned to combine these symbols in regular ways, or in what linguists call"proto-grammar."Once, Savage-Rumbaugh says, on an outing in a forest by the Georgia State University laboratory where he was raised, Kanzi touched the symbols for"marshmallow"and"fire."Given matches and marshmallows, Kanzi snapped twigs for a fire, lit them with the matches and toasted the marshmallows on a stick.

    Savage-Rumbaugh claims that in addition to the symbols Kanzi uses, he knows the meaning of up to 3,000 spoken English words. She tests his comprehension in part by having someone in another room pronounce words that Kanzi hears through a set of headphones. Kanzi then points to the appropriate symbol on his keyboard. But Savage-Rumbaugh says Kanzi also understands words that aren’t a part of his keyboard vocabulary; she says he can respond appropriately to commands such as"put the soap in the water"or"carry the TV outdoors."

    About a year ago, Kanzi and his sister, mother, nephew and four other bonobos moved into a $10 million, 18-room house and laboratory complex at the Great Ape Trust, North America’s largest great ape sanctuary, five miles from downtown Des Moines. The bonobo compound boasts a 13,000-square-foot lab, drinking fountains, outdoor playgrounds, rooms linked by hydraulic doors that the animals operate themselves by pushing buttons, and a kitchen where they can use a microwave oven and get snacks from a vending machine (pressing the symbols for desired foods).

    Kanzi and the other bonobos spend evenings sprawled on the floor, snacking on M & M’s, blueberries, onions and celery, as they watch DVDs they select by pressing buttons on a computer screen. Their favorites star apes and other creatures friendly with humans such as Quest for Fire, Every Which Way But Loose, Greystoke: The Legend of Tarzan and Babe.

    Through a glass panel, Savage-Rumbaugh asks Kanzi if it’s OK for me to enter his enclosure."The bonobos control who comes into their quarters,"she explains. Kanzi, still the alpha male of this group in his middle age, has the mien of an aging patriarch—he’s balding and paunchy with serious, deep-set eyes. Squealing apparent agreement, he pushes a button, and I walk inside. A wire barrier still separates us."Kanzi can cause you serious damage if he wants,"Savage-Rumbaugh adds.

    Kanzi shows me his electronic lexigram touch pad, which is connected to a computer that displays—while a male voice speaks—the words he selects. But Kanzi’s finger slips off the keys."We're trying to solve this problem,"says Savage-Rumbaugh.

    She and her colleagues have been testing the bonobos’ ability to express their thoughts vocally, rather than by pushing buttons. In one experiment she described to me, she placed Kanzi and Panbanisha, his sister, in separate rooms where they could hear but not see each other. Through lexigrams, Savage-Rumbaugh explained to Kanzi that he would be given yogurt. He was then asked to communicate this information to Panbanisha."Kanzi vocalized, then Panbanisha vocalized in return and selected ‘yogurt’ on the keyboard in front of her,"Savage-Rumbaugh tells me.

    With these and other ape-language experiments, says Savage-Rumbaugh,"the mythology of human uniqueness is coming under challenge. If apes can learn language, which we once thought unique to humans, then it suggests that ability is not innate in just us."

    But many linguists argue that these bonobos are simply very skilled at getting what they want, and that their abilities do not constitute language."I do not believe that there has ever been an example anywhere of a nonhuman expressing an opinion, or asking a question. Not ever,"says Geoffrey Pullum, a linguist at the University of California at Santa Cruz."It would be wonderful if animals could say things about the world, as opposed to just signaling a direct emotional state or need. But they just don’t.”

    Whatever the dimension of Kanzi’s abilities, he and I did manage to communicate. I’d told Savage-Rumbaugh about some of my adventures, and she invited me to perform a Maori war dance. I beat my chest, slapped my thighs and hollered. The bonobos sat quiet and motionless for a few seconds, then all but Kanzi snapped into a frenzy, the noise deafening as they screamed, bared their teeth and pounded on the walls and floor of their enclosure. Still calm, Kanzi waved an arm at Savage-Rumbaugh, as if asking her to come closer, then let loose with a stream of squeaks and squeals."Kanzi says he knows you're not threatening them," Savage-Rumbaugh said to me," and he'd like you to do it again just for him, in a room out back, so the others won't get upset.”

    I’m skeptical, but I follow the researcher through the complex, out of Kanzi's sight. I find him, all alone, standing behind protective bars. Seeing me, he slapped his chest and thighs, mimicking my war dance, as if inviting me to perform an encore. I obliged, of course, and Kanzi joined in with gusto.


    To better understand bonobo intelligence, I traveled to Des Moines, Iowa, to meet Kanzi, a 26-year-old male bonobo reputedly able to converse with humans. When Kanzi was an infant, American psychologist Sue Savage-Rumbaugh tried to teach his mother, Matata, to communicate using a keyboard labeled with geometric symbols. Matata never really got the hang of it, but Kanzi—who usually played in the background, seemingly oblivious, during his mother’s teaching sessions—picked up the language.

    Savage-Rumbaugh and her colleagues kept adding symbols to Kanzi’s keyboard and laminated sheets of paper. First Kanzi used 6 symbols, then 18, finally 348. The symbols refer to familiar objects (yogurt, key, tummy, bowl), favored activities (chase, tickle), and even some concepts considered fairly abstract (now, bad).

    Kanzi learned to combine these symbols in regular ways, or in what linguists call"proto-grammar."Once, Savage-Rumbaugh says, on an outing in a forest by the Georgia State University laboratory where he was raised, Kanzi touched the symbols for"marshmallow"and"fire."Given matches and marshmallows, Kanzi snapped twigs for a fire, lit them with the matches and toasted the marshmallows on a stick.

    Savage-Rumbaugh claims that in addition to the symbols Kanzi uses, he knows the meaning of up to 3,000 spoken English words. She tests his comprehension in part by having someone in another room pronounce words that Kanzi hears through a set of headphones. Kanzi then points to the appropriate symbol on his keyboard. But Savage-Rumbaugh says Kanzi also understands words that aren’t a part of his keyboard vocabulary; she says he can respond appropriately to commands such as"put the soap in the water"or"carry the TV outdoors."

    About a year ago, Kanzi and his sister, mother, nephew and four other bonobos moved into a $10 million, 18-room house and laboratory complex at the Great Ape Trust, North America’s largest great ape sanctuary, five miles from downtown Des Moines. The bonobo compound boasts a 13,000-square-foot lab, drinking fountains, outdoor playgrounds, rooms linked by hydraulic doors that the animals operate themselves by pushing buttons, and a kitchen where they can use a microwave oven and get snacks from a vending machine (pressing the symbols for desired foods).

    Kanzi and the other bonobos spend evenings sprawled on the floor, snacking on M & M’s, blueberries, onions and celery, as they watch DVDs they select by pressing buttons on a computer screen. Their favorites star apes and other creatures friendly with humans such as Quest for Fire, Every Which Way But Loose, Greystoke: The Legend of Tarzan and Babe.

    Through a glass panel, Savage-Rumbaugh asks Kanzi if it’s OK for me to enter his enclosure."The bonobos control who comes into their quarters,"she explains. Kanzi, still the alpha male of this group in his middle age, has the mien of an aging patriarch—he’s balding and paunchy with serious, deep-set eyes. Squealing apparent agreement, he pushes a button, and I walk inside. A wire barrier still separates us."Kanzi can cause you serious damage if he wants,"Savage-Rumbaugh adds.

    Kanzi shows me his electronic lexigram touch pad, which is connected to a computer that displays—while a male voice speaks—the words he selects. But Kanzi’s finger slips off the keys."We're trying to solve this problem,"says Savage-Rumbaugh.

    She and her colleagues have been testing the bonobos’ ability to express their thoughts vocally, rather than by pushing buttons. In one experiment she described to me, she placed Kanzi and Panbanisha, his sister, in separate rooms where they could hear but not see each other. Through lexigrams, Savage-Rumbaugh explained to Kanzi that he would be given yogurt. He was then asked to communicate this information to Panbanisha."Kanzi vocalized, then Panbanisha vocalized in return and selected ‘yogurt’ on the keyboard in front of her,"Savage-Rumbaugh tells me.

    With these and other ape-language experiments, says Savage-Rumbaugh,"the mythology of human uniqueness is coming under challenge. If apes can learn language, which we once thought unique to humans, then it suggests that ability is not innate in just us."

    But many linguists argue that these bonobos are simply very skilled at getting what they want, and that their abilities do not constitute language."I do not believe that there has ever been an example anywhere of a nonhuman expressing an opinion, or asking a question. Not ever,"says Geoffrey Pullum, a linguist at the University of California at Santa Cruz."It would be wonderful if animals could say things about the world, as opposed to just signaling a direct emotional state or need. But they just don’t.”

    Whatever the dimension of Kanzi’s abilities, he and I did manage to communicate. I’d told Savage-Rumbaugh about some of my adventures, and she invited me to perform a Maori war dance. I beat my chest, slapped my thighs and hollered. The bonobos sat quiet and motionless for a few seconds, then all but Kanzi snapped into a frenzy, the noise deafening as they screamed, bared their teeth and pounded on the walls and floor of their enclosure. Still calm, Kanzi waved an arm at Savage-Rumbaugh, as if asking her to come closer, then let loose with a stream of squeaks and squeals."Kanzi says he knows you're not threatening them," Savage-Rumbaugh said to me," and he'd like you to do it again just for him, in a room out back, so the others won't get upset.”

    I’m skeptical, but I follow the researcher through the complex, out of Kanzi's sight. I find him, all alone, standing behind protective bars. Seeing me, he slapped his chest and thighs, mimicking my war dance, as if inviting me to perform an encore. I obliged, of course, and Kanzi joined in with gusto.

        Subscribe now for more of Smithsonian's coverage on history, science and nature.



    Digg
     
    Comments (21)

    + View All Comments

    "It would be wonderful if animals could say things about the world, as opposed to just signaling a direct emotional state or need. But they just don’t.”

    If you want to be technical about it........
    Actually, there are animals that do, they call themselves Humans, aka, Homosapiens.

    Posted by Tonia Darling on January 7,2012 | 12:31 AM

    Monkey see - Monkey do.

    Posted by Jim Smith on August 6,2011 | 06:45 PM

    What is amazing about animals is not just what we teach them and they mimic but how they change what we teach them to fit their own wants showing the ability to decide for themselves how they want to interact and utilize various tools like symbols to communicate or to even choose not to.

    Posted by Susan Pelczynski on April 2,2011 | 11:20 AM

    A minor in primatology would enable linguists to understand the nature of language in primates.

    Posted by James Norton on January 7,2011 | 08:28 PM

    Research like this just fascinates me.
    Alex the parrot .... also the British parrot who tended to point at pictures his owner was concentrating on in her own mind, on another floor of the building....
    Squirrels have been observed "faking it" when it comes to hiding acorns, just the way jays dowith food. It looks like they've tucked it away, but they still have it in their mouth and move it several times before REALLY burying it.
    Cool stuff.

    Posted by Ann O'Connell on November 16,2010 | 02:05 PM

    Just to be precise, Bo, war isn't something "males" do. War is something societies do. Societies have tended to be male-dominated since the neolithic revolution, but when women get into top positions they go to war too.

    Posted by Mellie on October 22,2010 | 07:04 PM

    I recall reading a news article on front page of Atlanta Journal-Constitution where it was announced that bonobos are 99.4% identical to humans. This was up from 98.4. Use of sex to diffuse tension - think that might stop war? Wouldn't that be a break through: powerful, frustrated male humans think it is cool to kill people and take their stuff, making billions on mass murder. Shouldn't that be unthinkable? God Bless the Bonobos!

    Posted by Bo Sewell on August 19,2010 | 05:19 PM

    Wow this is the most wonderful thing in the universe!

    Posted by Georgey on December 1,2009 | 04:04 AM

    I'd always known that Bonobos are special, of course for their amazing and even revolutionary behaviour...I love them in such a great way, and envy them for they peaceful and kind way of being...This news about them can just enhance my esteem for them...Scientists who work with them are very lucky and smart...I don't know who I envy more in the end :) ...peace and love...bonobo power...byeeee

    Posted by Vittorio on October 19,2009 | 04:39 PM

    i like kanzi is a smart monkey

    Posted by jeremy reedy on October 8,2009 | 01:53 PM

    Bonobo's can't physically speak as their vocal cords are different to ours.

    Posted by Noodles on September 10,2009 | 01:41 PM

    Brilliant work. Bravo!

    Posted by cynthia Claiborne on April 15,2009 | 08:02 PM

    Very cool, I read this article in a school test and wanted to learn more about Kanzi.

    Posted by Michael Morlan on March 5,2009 | 01:26 PM

    i think it's interesting that people are forming opinions on the intellectual ability of bonobos, seemingly based on a single article. this article has no specific information about tests performed, controls implemented, data on progression of "learning." well, i guess i just wanted to say that because internet comments rather fascinate me. in reference to the actual article: i think it's a great reminder that animals are often more intelligent than we give them credit for. they deserve far more respect than they get, and personally i am really pleased to see that these chimps have the amount of autonomy they seem to be getting. humans are not the only animals that deserve respect and privacy.

    Posted by beth on November 18,2008 | 02:29 PM

    Post a Comment


    Name: (required)

    Email: (required)

    Comment:

    Comments are moderated, and will not appear until Smithsonian.com has approved them. Smithsonian reserves the right not to post any comments that are unlawful, threatening, offensive, defamatory, invasive of a person's privacy, inappropriate, confidential or proprietary, political messages, product endorsements, or other content that might otherwise violate any laws or policies.



    Advertisement


    Advertisement

    Follow Us






    First Name
    Last Name
    Address 1
    Address 2
    City
    State   Zip
    Email

    Smithsonian Store

    Smithsonian Journeys