My strong hive (of 2 hives) seemed to swarm a couple of days ago; I saw a swarm-mass in a hedge ~ 20' away. Odd, though: the ball of bees shrank away to nothing, and at the hive entrance, lots more bees were going in than out. A "prep swarm", maybe? Anyhow ... today the front of the hive has zillions of bees all over it (no swarming going on), and when I opened the lid -- the top of the inner cover was covered in bees.
Does all this mean anything?
I mean to do an extensive inspection Friday (s/b in the 80's and sunny then), and will look for swarm cells. I feel pretty certain they'll be around.
FWIW: I had 3 nice bait boxes in my yards when the "swarm" appeared. At the time, there was hardly any notice paid by The Girls of the boxes. Little since then, too.