Last week my son and I captured a swarm and put it in our hive. We inspected it a few days later and the bees were in there but still grouped together at the end of 2 of the frames. As the weather improved we started to see activity with bees leaving and returning to the hive. It looked good but then on Saturday afternoon a number of bees came out of the hive and circled around then flew off to the East. I thought we had lost them all but there is still activity at the hive with bees coming and going. Not as many as before but they are still there. Have we lost our queen and our colony and are these just the ones that were out and about when the colony decided to leave and "missed the bus"?

Is there any reason for them to leave? There were lost of flowers in bloom around and the hive had 8 frames of foundation.