The Short Answer
The most reliable sign that a queen has mated is that she is laying eggs, followed by a solid worker brood pattern. Beekeepers rarely confirm mating by looking at the queen herself. A virgin queen does not lay, so fresh eggs generally mean mating has happened.
How Long to Wait
A virgin queen emerges about 16 days after the egg is laid, and then typically needs roughly a week or more before mating flights, with laying starting some days after that. Weather can delay this. Many beekeepers wait about two to four weeks after emergence or after introducing a cell before declaring a problem. Opening the hive too often during this period can disturb the queen, so check sparingly (see how often to inspect your hive).
Signs a Queen Has Mated
- Eggs: look for single, upright eggs at the bottom of cells, with one egg per cell. A light angle and good lighting help.
- Worker brood pattern: capped brood in a compact pattern with flat cappings suggests a mated queen laying fertilized eggs.
- Calm colony: a queenright colony usually appears orderly and is building up. Behavior alone is not conclusive.
- Queen appearance: a mated queen often looks longer and heavier in the abdomen than a virgin, although this is not a dependable test.
Signs of a Problem
- No eggs after several weeks: the queen may have failed to mate, been lost on a flight or never emerged.
- Multiple eggs per cell or eggs on cell walls: this can occur with a young queen just beginning to lay or with laying workers.
- Drone brood in worker cells: raised, domed cappings across worker comb suggest a drone-laying queen or laying workers, which can mean she did not mate well. A colony in that state may be queenless.
- Spotty brood: can be caused by poor mating, disease or other factors, so interpret with care.
What to Do If You Are Not Sure
- Re-inspect after several more days and look specifically for eggs.
- Check for queen cells that bees may be building to replace her. See queen cells.
- Consider whether poor weather or a shortage of drones could have affected mating. More background is in natural mating and instrumental insemination.
- If she is not laying after a reasonable time, consider introducing a new queen. Details are in buying a mated queen.
If you are producing queens yourself, units such as a queen castle need the same checks for each compartment, and raising queen bees covers the full timeline.
FAQ
How can you tell a queen bee from other bees?
She is generally longer than workers, with a longer abdomen and shorter wings in proportion to her body, and she is often surrounded by attendants. Marking helps, and how to tell a queen from a worker gives more cues.
How does a queen bee mate?
She takes mating flights, meets drones in the air and mates with several of them before returning to the hive.
How long will a bee remember you?
Research on bee memory is limited and varies by task, so there is no firm answer for how long a bee recognizes a person.