Honey Bee swarms often frighten people who sight them, although they are usually not as dangerous as most perceive. Bee swarms generally occur as a part of the reproduction cycle. As a hive becomes overcrowded, the queen bee begins to lay eggs in the queen cells. Queen cells are unique cells in the honeycomb in which queen larvae are produced. The young virgin queen larvae are fed solely on royal jelly, an excretion from the worker bees. The diet of royal jelly causes these bees to mature fully, creating queens.