It may have been one of mine.Shortly after I hived it(about 40 minutes after I found it) another swarm came in to the same tree.I think the second swarm definitely was coming in from the east of my property. there was a dark cloud of bees everywhere and quite an enjoyable hum in the air. I was not fortunate enough for the second swarm to stay in the box.But I still got the first. It filled 1 and 1/2 medium with bees!!
I caught a large swarm in this tree last year.It must be my bee tree. Hope another couple come my way.