Drones 

　Drones are the bee that exists only to mate with the queen of the other hive.
It's bigger than the worker bees, and the beehive rooms , where the drones grow, is also bigger than the worker bees. Besides, they have big eyes so that they could see the queen bee from the distance.

The work of the drones 

The male bee does not have something to do like a worker bee, so it usually lives loitering around in its nest, nibbling for food to the worker bees.
In addition, to find mating partners, they go out every day in search of  new queen bees. And the drones gather in places where the new queen bee still unmated outside the nest, is supposed to come anc wait.
When they find the queen bee, they hunt desperately. Only the those can catch up with the queen bee can mate. As soon as they mate, they will die immediately.
The drones, who can't mate, go back in and do it again until they mate. In fall, the drones that only eat food are worthless so they are driven out of the nest by the worker bees, and they die because they cannot live themselves.