I'd think that small of a swarm is just a mating flight of a new queen. I screwed up two hives last year, being quick to grab all swarms I saw, and I inadvertently stole queens from two bigger hives the same way. Not enough bees to make a strong hive, and the big hive lost two weeks with the waiting for their queen to hatch and come home........

One big hie made it, the other did not. BOTH the small swarms failed, I didn't feed them profusely, and they just did not have the numbers to make it.
This year, I took what I learned about my yard, and decided to let them do all the splitting and just watch swarms and take the bigger ones who set up shop and stay for a full day. The mating flight swarms seemed to mostly be midday, and by evening the queen was rested enough to fly back to er parent hive, and just motored right along. I'd like to just let them do this each time..... but I have houses pretty close, so I need to stay on top of them and minimize swarming from here on out. Again.... learning more as I go.
If'n the boys need help, I will hit you up!! Thank you very much. And, when we are a free country again......

I will head out to see my son, and will definitely get with you to meet up and spend a little time in person.
