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New York Times - Chimps Show a Thirst for Learning
Wild chimpanzees in the Budongo Forest in Uganda have learned to use leaves combined with moss to make a drinking utensil.
By Sindya N. Bhanoo
October 6, 2014
Wild chimpanzees in Uganda have been caught on tape developing a new drinking utensil: a mixture of moss and folded leaves that they place in their mouths and then dip into water.
Although it has long been understood that chimpanzees learn by observing one another, scientists say this is the first time humans have witnessed the origins of such behavior. A new study in the journal PLOS Biology describes the phenomenon and how the researchers watched it spreading from chimp to chimp.
Previously, the chimps used only leaves to make the tool. It is not clear whether the new mixture is an improvement, but an author of the study, Thibaud Gruber, a primatologist at the University of Neuchâtel in Switzerland, said, “One day the alpha male decided to add some moss, and from that moment it took off.”
The dominant female in the group watched the alpha male, and then tried making the same tool for herself.
“Every chimpanzee learned this by observing another,” Dr. Gruber said.
The chimpanzees, who live in Budongo Forest, have been observed continuously for about 20 years. “For all of us working in the field, we knew for a long time that social learning was happening,” Dr. Gruber said. “But we didn’t have this kind of evidence where a new behavior developed before our eyes.”
A version of this article appears in print on Oct. 6, 2014, on Page D2 of the New York edition with the headline: Animal Behavior: Chimps Show a Thirst for Learning.
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By Sindya N. Bhanoo
October 6, 2014
Wild chimpanzees in Uganda have been caught on tape developing a new drinking utensil: a mixture of moss and folded leaves that they place in their mouths and then dip into water.
Although it has long been understood that chimpanzees learn by observing one another, scientists say this is the first time humans have witnessed the origins of such behavior. A new study in the journal PLOS Biology describes the phenomenon and how the researchers watched it spreading from chimp to chimp.
Previously, the chimps used only leaves to make the tool. It is not clear whether the new mixture is an improvement, but an author of the study, Thibaud Gruber, a primatologist at the University of Neuchâtel in Switzerland, said, “One day the alpha male decided to add some moss, and from that moment it took off.”
The dominant female in the group watched the alpha male, and then tried making the same tool for herself.
“Every chimpanzee learned this by observing another,” Dr. Gruber said.
The chimpanzees, who live in Budongo Forest, have been observed continuously for about 20 years. “For all of us working in the field, we knew for a long time that social learning was happening,” Dr. Gruber said. “But we didn’t have this kind of evidence where a new behavior developed before our eyes.”
A version of this article appears in print on Oct. 6, 2014, on Page D2 of the New York edition with the headline: Animal Behavior: Chimps Show a Thirst for Learning.
Order Reprints | Today’s Paper | Subscribe
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