I had a "swarm" move into a bait hive a week and half ago. I left them to their own devices until yesterday,when I went to inspect. I had been concerned because I didn't see as many foragers as I thought I should, or bees bringing in pollen, and wasn't sure I had a viable swarm. Sure enough, there only seemed to be about 100 bees inside working over the bait comb but not building any new comb or extending the old. I searched for a queen and didn't find one, and the combs had no eggs in any of the cells. By the dead bees scattered on the floor and not being removed, to the bees falling off the comb and dying even as I examined the comb, I suspected that a swarm must have left these bees behind while they were foraging some time earlier in the week and they were starving. As I removed the top bars, they stayed clustered around the entrance and in the gaps of the bars, fanning. The lack of aggression and the fanning made me think there must be a queen, so I double checked, but all the bees were workers. There are too few to worry about combining with another hive, so I plan to just open the hive up and let them find another place to live. I'm curious if anyone else has had this happen.