Drone and worker brood are different, the drone is larger as the developing pupae needs more room. You can see in the photo below that the drone brood on the left has domed caps on the cells whereas the cappings over the worker brood which is on the right is almost flat.



Queen cells are very much larger, hanging down either in the middle of a comb, if the colony is superseding the queen. Swarm cell are usually built at the bottom of the comb.

Drone and Worker Brood


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