Scientists have spent years decoding the honey bee "waggle dance," a highly sophisticated form of communication. Researchers from the University of California San Diego and their international partners have now clarified how this behavior allows bees to share detailed information about food locations with others in the hive.

A new study published in the Proceedings of the National Academy of Sciences shows that the dance is not just about the performer. It also depends on the audience. The researchers found that foraging bees are not simply delivering a fixed message. Instead, how accurately they point others to food changes based on who is watching.

How the Waggle Dance Communicates Food Location

When a bee discovers a good food source, it returns to the hive and performs a rapid, repeating dance to share the location. As nearby bees observe, the dancer moves forward while shaking its abdomen, then circles back and repeats the pattern within seconds.

The direction of the dance relative to the sun tells other bees where to go, while the length of each movement signals the distance. This system allows the colony to efficiently find and exploit food.

Audience Size Affects Dance Accuracy

Professor James Nieh of the UC San Diego School of Biological Sciences compares this behavior to a street performer. With a large audience, performers can focus on delivering a consistent act. But when the crowd shrinks, they shift their attention to attracting and holding interest.

Bees show a similar pattern. When fewer hive mates are paying attention, the dancer moves around more in search of followers. This added movement makes it harder to maintain the precise pattern needed to communicate accurate directions.

"Everyone has seen a street musician or a performer adjust to a changing crowd," said Nieh, a faculty member in the Department of Ecology, Behavior and Evolution. "In the hive, we see a comparable tradeoff. When fewer bees follow, dancers move more as they search for their audience, and the dance becomes less precise."

Experiments Reveal Role of Social Feedback

Working with collaborators from the Chinese Academy of Sciences and Queen Mary University of London, Nieh and his team studied bees in controlled hives designed to mimic natural conditions. They closely observed the hive "dance floor," where bees gather and interact.

In one experiment, the researchers varied how many bees were present to see how audience size influenced performance. In another, they kept numbers steady but changed the audience by adding young worker bees, which typically do not follow dances. In both situations, dancers were less precise when the audience was smaller or less engaged.

"The waggle dance is often presented as a one-way information transfer," said Ken Tan, the senior author of the study and a researcher at the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences. "Our data show that feedback from the audience shapes the signal itself. In that sense, the dancer is not only sending information, but also responding to social conditions on the dance floor."

How Bees Sense Their Audience

The study also sheds light on how bees detect their audience. Other bees frequently touch the dancer with their antennae and bodies. These physical interactions likely help the performer sense how many bees are nearby and how engaged they are.

Lars Chittka, a researcher at Queen Mary University of London, noted that "humans aren't the only ones who perform differently depending on their audience. Our study shows that honey bees quite literally dance better when they know someone is watching. When followers are scarce, dancers wander around searching for listeners -- and in doing so, their signals become fuzzier. It's a lovely reminder that even in the miniature world of insects, communication is a deeply social affair."

Implications for Animal Communication and Beyond

These findings go beyond honey bees and offer insight into how groups of animals share information. Many collective systems rely on signals that must be repeated, received, and acted upon.

"The new findings show that the accuracy of a signal can depend on the availability of receivers, not only on the motivation of the sender," said Nieh. "That kind of feedback may be important in animal societies, engineered swarms and other distributed systems where the quality of information can rise or fall with audience dynamics."

The study's researchers include: Tao Lin, Shihao Dong, Gaoying Gu, Fu Zhang, Xiuchuan Ye, Tianyi Wang, Ziqi Wang, Jianjun Li, James C. Nieh, Lars Chittka and Ken Tan.

Funding for the study was provided by the 14th Five-Year Plan of Xishuangbanna Tropical Botanical Garden; Chinese Academy of Sciences (E3ZKFF3B); the Yunnan Revitalization Talents Support Plan (XDYC-QNRC-2023-0566); and National Natural Science Foundation of China (32571753 and 32322051).