HOW BROWN CAPUCHIN MONKEY learned to exchange coins for food?

Stories

Brown Capuchin Monkey Economics

That human intelligence is superior in the living world is almost a truism. Great intelligence—and a unique ability to reason, to experience emotion, to communicate using complex language, and to understand and employ symbolism—are the criteria by which humans are set apart from the rest of the Earth’s creatures. By our own admission, we are the world’s greatest thinkers, and profoundly so.

Brown-Capuchin-monkey-foraging

A brown capuchin monkey forages in a palm tree at the Tambopata Research Center in Madre de Dios, Peru

 

While we do not yet have any direct evidence, astronomers tell us that as many as a million worlds within our own galaxy, the Milky Way, might be inhabited by intelligent life. And with around 400 billion other galaxies sprawled throughout the cosmos, intelligent life is essentially a statistical certainty—a striking and very beautiful proposition indeed. Yet, for the past several hundred years, scientific discoveries have steadily eroded the uniqueness, the exceptionality, and the centrality of the human species and our place in the world. It all started, of course, with the discovery that the sun does not revolve around the Earth—that our humble little planet is but an insignificant blip in a vast universe replete with countless other worlds, with each one precisely, simultaneously, at its center.

Most recently, however, it is the cognitive scientists—those who study the acquisition of knowledge and understanding through thought and experience—that are teaching us that we must rethink the notion of our supremacy and our matchless intellect, right here on Earth. They are doing so not only by teaching sign language to gorillas and chimpanzees—an astonishingly impressive feat on the part of researcher and ape alike, to be sure—but by teaching us how the brains of our more distantly-related cousins, the monkeys, work. As it turns out, those monkey brains work a lot like our own.

The brown capuchin monkey, Cebus apella, is one of several species of capuchins found throughout the Amazon basin, including in Tambopata. The brown capuchin is widely considered among the most intelligent of the New World primates, or the monkeys and tamarins of the American tropics.

Recently, a group of researchers working in a laboratory at Yale University have successfully introduced the concept of currency to their captive brown capuchins. After months of introducing the monkeys to the small, metal disks that would serve as coins, the monkeys learned that they could exchange these coins for highly prized food items such as grapes.

Before long, the monkeys learned how to budget their coins, especially after the researchers introduced another highly-prized food item to the menu: Jell-O. When the price of Jell-O was reduced compared to grapes, monkeys reacted in precisely the way that current laws of economics in humans predict: they bought more Jell-O.

Perhaps the researchers’ most stunning find came after a monkey was observed exchanging money for sex with another monkey. The monkey had learned well the value of money, and most importantly, that it could be used to trade for goods and services—even prostitution!

 

 

Brown Capuchin Monkey

The facial expressions of brown capuchin monkeys belie their human-like intelligence

 

You might ask, Why do monkeys have or need such powerful brains—which appear to have many of the high cognitive functions of our own—if they don’t appear to use them in many of the same ways that we do? Why, if they are able to barter for food and even sex in a laboratory setting using a symbolic currency, do we not see monkey towns and cities dotted throughout the rainforests of tropical America, instead of only human towns and cities?

We can’t yet answer the second question, although it is most likely the result of a combination of factors, including a poorly-developed vocal organ that prevents the use of complex language, limited tool use, a lack of bipedalism, or other factors which we do not yet know. But we can fairly confidently answer the first question, Why do monkeys have such powerful brains?

Although monkeys do not typically do math or read or write, they do live in cooperative groups with complex social structures. Large groups provide protection in numbers, and with large snakes, jungle cats, and birds of prey standing (or slithering or flying) at the ready day and night to make a meal of a monkey, group life has its benefits.

Powerful brains..

But living in a group presents other challenges. For instance, a strict social hierarchy, in which dominant animals feed first at an abundant resource such as a fruiting tree, say, allows everyone to access food without a brawl each time food is discovered by the group. But how best to remember one’s place in such a hierarchy? Evidently, a large brain allows monkeys to know and recognize other individual monkeys, as well as their own and others’ social statuses.

They also use their powerful brains, just as we do, to analyze the feelings and intentions of others, which is done with the help of a large amount of computing power. As we all know, social life and in-group politics are complex, and powerful brains have given primates the tools they need to survive and reproduce in large social groups.

This explanation makes evolutionary sense for humans, as well. Those individuals with more highly-developed brains—which should, on average, make them more competitive in a group setting—should again, on average, reproduce more. Their offspring, in turn, will have bigger, more powerful brains, and so on, until, after many generations, intelligence on the order of that of humans has evolved from our more humbly intelligent ancestors.

brown capuchin

It is beautiful to consider that we share an evolutionary kinship with these amazing, inquisitive, and crafty creatures. The capuchin’s sharp intellectual abilities provide evidence of that kinship.

 

Discoveries in the cognition of non-human primates—like the brown capuchin monkeys of Tambopata—continue to shatter the notions of total human uniqueness and our superiority over the rest of the Earth’s lifeforms. But, instead of viewing this as a demotion, I argue that such amazing discoveries are causing to celebrate. To celebrate the emerging knowledge that we are part of a complex yet beautiful creation in which all creatures share in the history and a future more interconnected and fascinating than we’ve ever before imagined—even if some of our shared characteristics might seem a bit unsavory.

There remains so much more to learn about human and non-human primate cognition. But one thing is already certain: monkeys are smart, and they use their brains in many of the same ways that we do, often to achieve similar or identical ends. In reality, this should not come as a surprise—on the grand evolutionary tree of life, we are very close relatives. But monkey prostitution? I don’t think anybody expected that!

And as usual, sign up for your free trial of the Amazon cam here and help us identify the Amazon wildlife that is on the photos taken by our 20 square kilometer grid of 78 cameras snapping away in the middle of the Amazon jungle. You can start practicing photo identification with our free illustrated plates of 172 Amazon Rainforest Animals

 

by Geoff Gallice 

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A truly magical experience. It’s set in a completely unique location in the middle of the jungle with no other lodges around. The guide we had (Jarinson) was the best, so so knowledgeable, experienced and lovely to spend the time with. The lodge itself is beautiful and food was great too. Would highly recommend. Read all

Interesting bus and river boat rides bring you to Posada Amazonas on the Tambopata River. It’s managed by the Ese Eja indigenous community. Luis M., our guide, helped us observe birds and learn about plants and other animals. A canopy tower, clay lick and oxbow lake are highlights. All personnel are extremely kind and researchers give short lectures in the evening. The food is delicious! Excellent mosquito netting in rooms! Read all

Wow where do I even begin. This was one of the most unique and special experiences we've ever had. You are smack dab in the middle of nowhere, deep in the Amazon jungle. Surrounded by plants and animals of all kinds and some of the most breathtaking scenery you can imagine. And in the company of scientists doing conservation work all around you. The facility is gorgeous beyond belief. Everything is so thoughtfully prepared, from water servers everywhere to comfy couches to hammocks to raised walkways so you can pad around barefoot without feeling like you're going to step on a scorpion. The meals are positively gourmet. They have delicious fresh juice out for you when you come back from your hikes. We spend 2 days there and I genuinely feel like I saw the jungle. 2-3 excursions a day with a private guide to show you everything from plants to birds to animals to a very tall tower where you can watch the sunset over the canopy. We only had 3 people in our group but I believe there can be up to 7. You have the same guide your whole trip so you really get to know them. Johan was our guide and he was wonderful. And I do believe the number of excursions/type/length can be adjusted based on your groups physical ability. The rooms are beautiful and comfy and they help you prepare mosquito netting at night so you can be comfortable. There's a full bar, in the middle of the rainforest. At night there are short (30 min) lectures you can go to if you want where the scientists talk about their work. Fascinating. We loved that the center was very eco conscious and put a lot of effort into being low impact while also offering a truly luxurious experience. That being said. Do yourself a favor and read the web site. This experience will not be for everyone. Ppl posting negative comments here about the heat, bugs, open rooms, etc did not do their homework. You are far, far inside pristine Amazon jungle. It is hot, humid, rainy, and there are bugs. You can expect to use your lovely shower a few times a day to cool off. Fortunately you have lots of down time during the heat of the day to rest under the ceiling fan in your room. There were lots of grasshoppers, moths etc around our room but honestly we didn't have many issues with biting insects or mosquitos despite visiting during the rainy season (we did use bug spray). Your room has one open wall that faces nature. Yes, technically than means someone could see you walking around naked in your room, but you are 15 feet up in the air and facing directly into thick jungle, there is no one out there besides birds and monkeys to see you. They do cut the brush back so nothing except maybe some birds could get into your room. The sounds are magical at night and during the day. It's hot especially if you go during the rainy season as we did. If you hate bugs or can't handle life without air conditioning, this is not for you. Truthfully we had no issues sleeping. Ventilation is another big benefit of the one open wall. Think of this as the glampiest glamping you'll ever do and you will not be disappointed. Read the web site and reviews thoroughly and you won't be surprised. Being good hiking shoes, a lightweight waterproof jacket, refillable water bottle, a hat, binoculars (you can rent them too), bug spray, and sunscreen. Lightweight long sleeved shirts and long pants are essential bc you want to be covered so you won't get bitten or in case you brush up against a nasty plant. We saw monkeys, macaws, capybaras, owls, a caiman, and some cool jungle bugs. The guides even have a telescope you can use to both look at the animals and take great pictures with your phone. once in a lifetime experience in one of the most special and precious ecosystems in the world. Worth every penny and honestly we felt the price was cheap considering what you get. The highlight of our trip to Peru. Thank you so much. Read all

It was our first time in the rainforest and we wouldn't do it any other way. The boat rides on the Madre de Dios and the walks through the rainforests were both exciting and peaceful. Exciting when we spotted wildlife and peaceful as we settled in to hear the sounds and sights of the forest. The lodge was comfortable and the food was great. The research talks in the evenings were a great pre-dinner ritual for us. Do check them out. Saul was an amazing guide - friendly, fun, knowledgeable and very tuned to the rainforest. He could pick up on slight sounds and movements and helped us spot some great wildlife. Read all

TRC is up close with nature deep inside the Peruvian Amazon. If you are a fan of wildlife and love being in the nature this is the place for you. This is an eco lodge, so come with similar expectations. The sound of macaws flying over would make your day. TRC is doing some amazing work on Macaw conservation, the visits to the clay lick would be special. During your journey you would be able to spot a number of animals, birds. Do not miss the guided walks, you would really see a lot of monkeys. If you are a photographer, invest in a good zoom lens ( it will pay you back). The other thing is the amazing staff that take care of you. The food is among the very best I tasted in Peru and they really pamper you. So make sure you walk a lot to burn the additional calories :) Starting from the booking to the pickup in the airport everything is meticulously planned. From Mariella of the booking team, Juan Carlos the guide and Tania, our manager in the hotel everyone was fantastic. Ultimately spotting wild animals is a lot of luck, but this would be a great experience. Rooms: Rooms are large, spacious with wide open balconies, but no monkeys come in ( they strictly don't encourage wildlife feeding). Nearby activities: Lots of them, morning hikes, afternoon hikes, sunset cruise Walkability: You need to walk a bit, so you need to be mobile Food & drinks: Awesome Buffet, great food. Read all

TRC is up close with nature deep inside the Peruvian Amazon. If you are a fan of wildlife and love being in the nature this is the place for you. This is an eco lodge, so come with similar expectations. The sound of macaws flying over would make your day. TRC is doing some amazing work on Macaw conservation, the visits to the clay lick would be special. During your journey you would be able to spot a number of animals, birds. Do not miss the guided walks, you would really see a lot of monkeys. If you are a photographer, invest in a good zoom lens ( it will pay you back). The other thing is the amazing staff that take care of you. The food is among the very best I tasted in Peru and they really pamper you. So make sure you walk a lot to burn the additional calories :) Starting from the booking to the pickup in the airport everything is meticulously planned. From Mariella of the booking team, Juan Carlos the guide and Tania, our manager in the hotel everyone was fantastic. Ultimately spotting wild animals is a lot of luck, but this would be a great experience. Read all

The immersion experience was great. Be prepared though to feel hot and full of bug spray much of the time. Wear hiking pants. Not Lulu leggings (too hot). The guides are great and you can do as much or as little as you want. We saw a lot of animals. Read all

Posadas Amazonas is an eco-friendly lodge that makes a huge commitment to preserving the rainforest for generations to come. The food served (breakfast, lunch and dinner) is fresh and delicious! The staff is extremely knowledgeable and caring. A special shoutout to the lodge manager Cesar for ensuring that we had packed meals for the onward journey when we were delayed by a rain storm. The main attractions apart from the abundant wildlife are the canopy tower and nearby Oxbow lake. The canopy tower gives a great 360 degree view of the rainforest and we were fortunate to see monkeys and macaws from the vantage point. At the Oxbow lake we saw river otters and Caimans and we were able to catch a piranha fish as well. Overall, Posada Amazonas is a great lodge owned and operated by the native communities located in the amazing Amazon rainforest. Read all

I had an amazing time here. I was traveling solo and did 4 days/3 nights through Inca Expert Travel. It was an unforgettable experience! I opted for a group tour for the excursions and am glad I did. Our guide, Boris, was fantastic and made sure we saw as much wildlife as possible. I can't say enough good things about him. The rest of the staff were also very kind. I enjoyed the large variety of fresh food at each meal. I felt safe and well-taken care of the entire time. Read all

TRC was an amazing place to stay. Being in the Amazon rainforest was truly like no other trip I have or will ever take. From arrival we were greeted by staff with cool drinks, warm welcomes. Beautiful main area w bar, sofas, tables,games. Our guide Fernando was SO knowledgeable, interesting, enthusiastic,. We already miss his smile and laugh :) We did every excursion available over our 4 days there. The night hike turned out to be our favorite as we spotted the wandering spider then and many other intersting moths/insects. January is hot and humid, so yes expect to be wet,sweaty. Pack extra bag for wet stinky clothes ... Be ok w insects as no 4th wall in your rooms so at night mosquitio nets do a good job preventing bugs in your bed but when you wake up to use bathroom excpect moths, grasshopppers etc in room. All harmless!! TRC does provide nice rainboots for wet swampy treks.. Read all

A perfect experience in the Amazon. Harry, our guide, made the entire experience very memorable. The food is good, the bar is expensive but good and the support staff were excellent. Tanya, the manager, took care of all our needs and was very supportive the entire stay. Please remember that the rooms are open to the nature and therefore comes with its pros and cons. You wake up with the nature including the mosquitos :) The experiences offered by the Refugio is fantastic and provides a great exposure to the Amazon. Dont miss the Macaw trip. It is just magical. Read all

This is a once-in-a-lifetime experience! From the getgo, it was easy to coordinate our 4-day stay at Tambopata. The booking was all done via email with quick responses, there was clear communication leading up to our stay and even upon arrival the staff was extremely organized (incl. taking our bags and making sure they arrived to our rooms). During our stay the staff was all very friendly and accomodating, the lodge was always clean (actually impressively clean given it is located in the jungle), and the food was great and plentiful. By far the best part of our stay was our tour guide, Saul. Upon arrival, Saul helped us pick our activities based on what animals we wanted to see (using his 10 years of experience). He worked on timing to make sure we can see as much as possible, was extremely knowledgable on the rainforest, the plants, the insects and the animals and noticeably put in the extra effort to find animals. You can tell that he truly loves his job and was always equally as excited to see the animals as us, even though he has seen them thousands of times. He helped us find monkeys, birds, countless insects, lizards, capybaras ect. I am 100% confident our experience wouldn't be the same without him. He even helped us capture these cool photos with only our iphone!! If you are planning to stay are TRC, I would highly recommend asking for Saul as a tour guide, if possible. Read all

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