| 1 | The study suggests this practice could lead to colony collapse. | |
| 2 | The queen's daughters manage the election of where and when the swarm should settle. | |
| 3 | The swarm-bearing man glided down a hill into a marsh. | |
| 4 | He's author of The Perfect Swarm: The Science of Complexity in Everyday Life. | |
| 5 | "It' s the most striking example of colony-level selection I know of, " Wheeler said. |