Oddly Enough / Episode 07
The House Hunt Without a Boss
Thousands of bees need a new home. Who gets to choose the address?
The queen is coming too. But the search leads to a few scouts, their dances and a crowd at the front door.
Follow the house hunt ↓The branch is a waiting room.
A honeybee swarm has left its old nest. Thousands of workers gather around their queen on a branch. They have moved out, but they have not yet moved in.
A few hundred scouts search for somewhere the colony can live. The queen is in the cluster. The house hunting is the workers’ job.
At Appledore Island, off the coast of Maine, researchers could offer swarms nest boxes and watch the search unfold. Marked scouts made it possible to follow individual bees as they returned with news.
A better home gets a longer dance.
A scout inspects a possible home, returns to the waiting swarm and dances. The dance carries directions to the place she visited. Other scouts can go and inspect it.
Some reports are more persistent than others. In the researchers’ comparisons, a better nest site prompted a longer dance than a mediocre one.
That matters. A more persistent advertisement can send more visitors to the site. Those visitors can return with reports of their own. A promising address starts to gather attention.
But when is there enough support to stop looking and move?
Count the bees at the front door.
In a 2004 study, Thomas Seeley and Kirk Visscher changed the front doors. Each of four swarms was tested with one nest box at a location, and with five identical boxes close together at another.
With five boxes, visiting scouts spread out. It took longer for a crowd to build at any one entrance. The swarm’s preparations for departure, and takeoff itself, were delayed.
The result supported a specific explanation: a gathering of scouts at a prospective home helps trigger preparation to move. The researchers called it a quorum.
The whole swarm doesn’t need a viewing.
Scouts returning from the chosen site begin signalling that it is time to prepare for flight. The waiting bees warm their flight muscles.
In experiments with competing sites, preparation could begin while some scouts still advertised another address. Unanimity among the dancers was not the trigger.
No bee has to assemble a complete property catalogue or call the final vote. Searching, reporting and gathering at a place can carry a swarm towards one shared destination.
The queen comes with them. She did not have to pick the house.
A little further into the story
How can a dance give an address?
The direction of the waggle run relates to the direction of the destination relative to the sun. Its duration conveys distance. For house hunting, the dance happens on the swarm’s surface.
How long a scout keeps advertising also matters: nest quality affects the number of dance circuits. An address and an endorsement are carried in different features of the behaviour.
How many scouts make a quorum?
The 2003 study found preparation associated with roughly 10–15 or more scouts together at a box. This is a local gathering, not 15 votes from the entire swarm.
It is evidence from particular experiments, not a universal headcount that guarantees every swarm will move.
Do they always choose the best home?
No guarantee follows. In one five-choice experiment reported by the researchers, the superior box was chosen in four of five trials. A good result is still different from perfection.
Calling this a decision does not make it a human election. The bees inspect, dance and respond to other bees; they do not exchange reasons or cast ballots.
Follow the evidence
- Cornell: watching honeybees choose a homeThe research setting, marked scouts, dances and comparisons between nest sites.
- Seeley and Visscher: Choosing a homeBehavioral Ecology and Sociobiology (2003). Competing nest sites, worker piping and a local gathering of scouts.
- Seeley and Visscher: Quorum sensing during nest-site selection by honeybee swarmsBehavioral Ecology and Sociobiology (2004). Paired one-box and five-box trials with four swarms.
- Seeley, Visscher and Passino: Group Decision Making in Honey Bee SwarmsThe researchers’ 2006 American Scientist account, hosted by UC Riverside. Dance communication, quorum evidence and limits.
Original explanatory illustrations. The drawings are schematics, not experimental images or data.